South Korean rapper Psy poses during a news conference before his concert in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT) 

South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) 

South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) 

South Korean rapper Psy (C) performs during his concert "Happening" in Seoul April 13, 2013. Psy will perform "Gentleman" in public for the first time on Saturday at a concert at Seoul's World Cup stadium but he has been coy about what dance to expect this time, except to hint that it is based on traditional Korean moves. Psy released his new single on Thursday hoping to repeat the success of "Gangnam Style" that made him the biggest star to emerge from the growing K-pop music scene. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) 

South Korean rapper Psy performs during his concert "Happening" in Seoul April 13, 2013. Psy performed his new song "Gentleman" in public for the first time on Saturday at the concert at Seoul's World Cup stadium. REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT) 

South Korean singer Psy performs his hit "Gangnam Style" during a morning television appearance in central Sydney October 17, 2012. Hundreds of fans came to see Psy's free performance of his chart topping hit which has been watched more than 478 million times on YouTube since July. REUTERS/Tim Wimborne (AUSTRALIA - Tags: ENTERTAINMENT) 

South Korean singer Psy dances after a news conference at a hotel in Seoul September 25, 2012. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: ENTERTAINMENT) 

South Korean rapper-singer Psy performs during the 2012 iHeart Radio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 21, 2012. REUTERS/Steve Marcus (UNITED STATES - Tags: ENTERTAINMENT) 

South Korean rapper-singer Psy performs during the 2012 iHeart Radio Music Festival at the MGM Grand Garden Arena in Las Vegas, Nevada September 21, 2012. REUTERS/Steve Marcus (UNITED STATES - Tags: ENTERTAINMENT) 

Korean rapper-singer Psy performs on NBC's "Today" show in New York September 14, 2012. REUTERS/Brendan McDermid (UNITED STATES - Tags: ENTERTAINMENT TPX IMAGES OF THE DAY) 

Korean rapper-singer Psy performs on NBC's 'Today' show in New York, September 14, 2012. REUTERS/Brendan McDermid (UNITED STATES - Tags: ENTERTAINMENT) 

Korean rapper-singer Psy (R) performs on NBC's "Today" show with hosts (L-R) Al Roker, Natalie Morales and Savannah Guthrie in New York September 14, 2012. REUTERS/Brendan McDermid (UNITED STATES - Tags: ENTERTAINMENT) 

Host Kevin Hart (L) performs with South Korean rapper Psy during the 2012 MTV Video Music Awards in Los Angeles, September 6, 2012. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENTERTAINMENT) (MTV-SHOW) 

South Korean rapper Psy poses backstage after presenting an award
at the 2012 MTV Video Music Awards in Los Angeles, September 6, 2012. REUTERS/Danny Moloshok (UNITED STATES - Tags: ENTERTAINMENT) (MTV-BACKSTAGE) 

Singer Psy performs as fans hold up his music CDs during his concert in Seoul August 11, 2012. The chubby, rapping singer with slicked-back hair and a tacky suit is the latest musical sensation to burst upon the world from South Korea, via a YouTube music video that has been seen by over 20 million people in under a month. In a nation famed for the pretty-boy but often bland bands of K-Pop, nobody was more surprised by the success of the video "Gangnam Style" than its creator, Psy, a musician with a decade-long career in his homeland who never thought to break overseas. Picture taken August 11, 2012. To match story KOREA-UNCOOL/ REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT SOCIETY) 

Singer Psy performs during his concert in Seoul August 11, 2012. The chubby, rapping singer with slicked-back hair and a tacky suit is the latest musical sensation to burst upon the world from South Korea, via a YouTube music video that has been seen by over 20 million people in under a month. In a nation famed for the pretty-boy but often bland bands of K-Pop, nobody was more surprised by the success of the video "Gangnam Style" than its creator, Psy, a musician with a decade-long career in his homeland who never thought to break overseas. Picture taken August 11, 2012. To match story KOREA-UNCOOL/ REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT SOCIETY) 

South Korean singer Psy speaks during an interview with Reuters before his concert in Seoul August 11, 2012. A chubby, rapping singer with slicked-back hair and a tacky suit is the latest musical sensation to burst upon the world from South Korea, via a YouTube music video that has been seen by over 20 million people in under a month. In a nation famed for the pretty-boy but often bland bands of K-Pop, nobody was more surprised by the success of the video "Gangnam Style" than its creator, Psy, a musician with a decade-long career in his homeland who never thought to break overseas. Picture taken August 11, 2012. To match story KOREA-UNCOOL/ REUTERS/Lee Jae-Won (SOUTH KOREA - Tags: ENTERTAINMENT SOCIETY HEADSHOT)