Singer Elton John (R), founder of the Elton John AIDS Foundation, and Doctor Rick Warren react as they arrive to testify before a Senate Appropriations State, Foreign Operations and Related Programs Subcommittee hearing on global health problems in Washington May 6, 2015. REUTERS/Carlos Barria TPX IMAGES OF THE DAY

Singer Elton John (C), founder of the Elton John AIDS Foundation, arrives to testify before a Senate Appropriations State, Foreign Operations and Related Programs Subcommittee hearing on global health problems in Washington May 6, 2015. REUTERS/Carlos Barria 

Singer Elton John (C), founder of the Elton John AIDS Foundation, testifies before a Senate Appropriations State, Foreign Operations and Related Programs Subcommittee hearing on global health problems in Washington May 6, 2015. REUTERS/Carlos Barria 

Singer Elton John, founder of the Elton John AIDS Foundation, arrives to testify before a Senate Appropriations State, Foreign Operations and Related Programs Subcommittee hearing on global health problems in Washington May 6, 2015. REUTERS/Carlos Barria 

Singer Elton John, founder of the Elton John AIDS Foundation, pauses as he testifies before a Senate Appropriations State, Foreign Operations and Related Programs Subcommittee hearing on global health problems in Washington May 6, 2015. REUTERS/Carlos Barria 

Singer Elton John, founder of the Elton John AIDS Foundation pauses as he testifies before a Senate Appropriations State, Foreign Operations and Related Programs Subcommittee hearing on global health problems in Washington May 6, 2015. REUTERS/Carlos Barria