62nd Grammy Awards – Arrivals – Los Angeles, California, U.S., January 26, 2020 – Heidi Klum, Tom Kaulitz and Bill Kaulitz. REUTERS/Mike Blake

62nd Grammy Awards – Arrivals – Los Angeles, California, U.S., January 26, 2020 – Heidi Klum, Tom Kaulitz and Bill Kaulitz. REUTERS/Mike Blake

Designer Bill Kaulitz poses for a photo before his show during Berlin Fashion Week in Berlin, Germany, July 6, 2019. REUTERS/Christian Mang

Designer Bill Kaulitz appears at the end of his show during Berlin Fashion Week in Berlin, Germany, July 6, 2019. REUTERS/Christian Mang

Models present creations by designer Bill Kaulitz during Berlin Fashion Week in Berlin, Germany, July 6, 2019. REUTERS/Christian Mang

Soccer Football - Bundesliga - Bayern Munich v Eintracht Frankfurt - Allianz Arena, Munich, Germany - May 18, 2019 Heidi Klum and Bill Kaulitz before the match REUTERS/Andreas Gebert DFL regulations prohibit any use of photographs as image sequences and/or quasi-video

Soccer Football - Bundesliga - Bayern Munich v Eintracht Frankfurt - Allianz Arena, Munich, Germany - May 18, 2019 Heidi Klum, Tom Kaulitz and Bill Kaulitz before the match REUTERS/Andreas Gebert DFL regulations prohibit any use of photographs as image sequences and/or quasi-video

Bill Kaulitz (R) of Tokio Hotel poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Tokio Hotel poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. Pictured are Georg Moritz Hagen Listing, Tom Kaulitz, Bill Kaulitz and Gustav Klaus Wolfgang Schaefer (L-R). REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Tokio Hotel band poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. Pictured are Georg Moritz Hagen Listing, Tom Kaulitz, Bill Kaulitz and Gustav Klaus Wolfgang Schaefer (L-R). REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Bill Kaulitz of Tokio Hotel poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Bill Kaulitz of Tokio Hotel poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Bill (R) and Tom Kaulitz of Tokio Hotel pose for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Bill Kaulitz of Tokio Hotel poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Bill Kaulitz of Tokio Hotel poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT HEADSHOT)

The tattoo of Bill Kaulitz of Tokio Hotel is seen during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Bill Kaulitz of Tokio Hotel poses for pictures during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT HEADSHOT)

The boots of Bill Kaulitz of Tokio Hotel is seen during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

The tattoo of Bill Kaulitz of Tokio Hotel is seen during a photo call promoting the band's new album Kings Of Suburbia in Berlin, October 2, 2014. REUTERS/Thomas Peter (GERMANY - Tags: ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV World Stage Live in Malaysia 2010 concert in Petaling Jaya, near Kuala Lumpur July 31, 2010. REUTERS/Lai Seng Sin/Pool (MALAYSIA - Tags: ENTERTAINMENT)

Bill Kaulitz (L) and Gustav Schafer (top, R) of German rock band Tokio Hotel perform during the MTV World Stage Live in Malaysia 2010 concert in Petaling Jaya, near Kuala Lumpur July 31, 2010. REUTERS/Lai Seng Sin/Pool (MALAYSIA - Tags: ENTERTAINMENT)

Canadian designers Dean (L) and Dan, and Tokio Hotel's singer Bill Kaulitz (C) of Germany acknowledge the applause at the end of the Dsquared2 Fall/Winter 2010/11 Men's collection during Milan Fashion Week January 19, 2010. REUTERS/Alessandro Garofalo (ITALY - Tags: FASHION ENTERTAINMENT IMAGES OF THE DAY)

Tokio Hotel's singer Bill Kaulitz of Germany presents a creation as part of the Dsquared2 Fall/Winter 2010/11 Men's collection during Milan Fashion Week January 19, 2010. REUTERS/Alessandro Garofalo (ITALY - Tags: FASHION ENTERTAINMENT)

Tokio Hotel's singer Bill Kaulitz of Germany presents a creation as part of the Dsquared2 Fall/Winter 2010/11 Men's collection during Milan Fashion Week January 19, 2010. REUTERS/Alessandro Garofalo (ITALY - Tags: FASHION ENTERTAINMENT)

Bill Kaulitz (L) of German rock band Tokio Hotel makes a speech after winning the trophy for 'Best German Act' during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz (L) of German rock band Tokio Hotel makes a speech after winning the trophy for 'Best German Act' during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel holds the trophy for 'Best German Act' during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel makes a speech after winning the trophy for 'Best German Act' during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz (L) of German rock band Tokio Hotel makes a speech after winning the trophy for 'Best German Act' during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz (L) and Georg Listing of German rock band Tokio Hotel perform during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Tom Kaulitz, Bill Kaulitz and Georg Listing (L-R) of German rock band Tokio Hotel perform during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT IMAGES OF THE DAY)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of German rock band Tokio Hotel performs during the MTV Europe Awards ceremony in Berlin November 5, 2009. REUTERS/Tobias Schwarz (GERMANY ENTERTAINMENT)

Bill Kaulitz of the band Tokio Hotel performs during the German TV game show "Wetten Dass" (Bet it...?) in Freiburg October 3, 2009. Wetten Dass is one of the most popular Saturday night programmes in Germany. REUTERS/Johannes Eisele (GERMANY ENTERTAINMENT IMAGES OF THE DAY)

Bill Kaulitz of the band Tokio Hotel performs during the German game show "Wetten Dass" (Bet it...?) in Freiburg October 3, 2009. "Wetten Dass" is one of the most popular Saturday night programmes in Germany. REUTERS/Johannes Eisele (GERMANY ENTERTAINMENT)

German TV show host Thomas Gottschalk (R) talks to Bill Kaulitz of the band Tokio Hotel during the German TV game show "Wetten dass...?" (Bet it...?) in Freiburg October 3, 2009. Wetten Dass is one of the most popular Saturday night programmes in Germany. REUTERS/Johannes Eisele (GERMANY ENTERTAINMENT)

Bill Kaulitz of the band Tokio Hotel performs during the German game show "Wetten Dass" (Bet it...?) in Freiburg October 3, 2009. Wetten Dass is one of the most popular Saturday night programmes in Germany. REUTERS/Johannes Eisele (ENTERTAINMENT)

Bill Kaulitz of the band Tokio Hotel performs during the German TV game show "Wetten Dass" (Bet it...?) in Freiburg October 3. Wetten Dass is one of the most popular Saturday night programmes in Germany. REUTERS/Johannes Eisele (ENTERTAINMENT)

Bill Kaulitz (L) and Tom Kaulitz of German group Tokio Hotel pose on the red carpet before the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008. REUTERS/Phil Noble (BRITAIN)

Bill Kaulitz (R) and Tom Kaulitz (L) of German group Tokio Hotel accept the headliner award at the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008.
REUTERS/Phil Noble (BRITAIN)

Bill Kaulitz of German group Tokio Hotel poses on the red carpet before the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008. REUTERS/Phil Noble (BRITAIN)

Bill Kaulitz (L) and Tom Kaulitz of German group Tokio Hotel pose on the red carpet before the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008. REUTERS/Phil Noble (BRITAIN)

Bill Kaulitz (L) and Tom Kaulitz of German group Tokio Hotel pose on the red carpet before the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008. REUTERS/Phil Noble (BRITAIN)

Lead singer Bill Kaulitz of German group Tokio Hotel accepts the Headliner award during the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008. REUTERS/Phil Noble (BRITAIN)

Bill Kaulitz (L) and Tom Kaulitz of German group Tokio Hotel pose on the red carpet before the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008. REUTERS/Phil Noble (BRITAIN)

Lead singer Bill Kaulitz of German group Tokio Hotel poses on the red carpet before the MTV Europe Music Awards ceremony in Liverpool, northern England, November 6, 2008. REUTERS/Phil Noble (BRITAIN)

Lead singer Bill Kaulitz (2nd R) and members of German pop group Tokio Hotel receive the Song of the Year trophy for "Monsoon", at the MTV Latin America Awards in Guadalajara, October 16, 2008. REUTERS/Daniel Aguilar (MEXICO)

Lead singer Bill Kaulitz (L) and bassist Georg Listing of German pop group Tokio Hotel perform during the MTV Latin America Awards in Guadalajara October 16, 2008. REUTERS/Daniel Aguilar (MEXICO)

Lead singer Bill Kaulitz of German pop group Tokio Hotel performs during the MTV Latin America Awards in Guadalajara, October 16, 2008. REUTERS/Daniel Aguilar (MEXICO)

Lead singer Bill Kaulitz of German pop group Tokio Hotel performs during the MTV Latin America Awards in Guadalajara October 16, 2008. REUTERS/Daniel Aguilar (MEXICO)

Employees of the German 'Madame Tussauds' present a wax figure of Bill Kaulitz, lead singer of the German pop band 'Tokio Hotel', in Berlin, September 30, 2008. REUTERS/Tobias Schwarz (GERMANY)

Gustav Schafer (L), Bill Kaulitz (2nd L), Tom Kaulitz (2nd R) and Georg Listing of Tokio Hotel pose backstage with their award for best new artist at the 2008 MTV Video Music Awards in Los Angeles September 7, 2008. REUTERS/Mario Anzuoni (UNITED STATES)

Gustav Schafer (L), Bill Kaulitz (2nd L), Tom Kaulitz (2nd R) and Georg Listing of Tokio Hotel pose backstage with their award for best new artist at the 2008 MTV Video Music Awards in Los Angeles September 7, 2008. REUTERS/Mario Anzuoni (UNITED STATES)

Bill Kaulitz of Tokio Hotel accepts award for Best New Artist at the 2008 MTV Video Music Awards in Los Angeles September 7, 2008. REUTERS/Mario Anzuoni (UNITED STATES)

Bill Kaulitz of Tokio Hotel accepts the award for Best New Artist with band members at the 2008 MTV Video Music Awards in Los Angeles September 7, 2008. REUTERS/Mario Anzuoni (UNITED STATES)