who sings say something
Christina Aguilera & A Great Big World: 'Say Something' AMAs 2013 Performance (Video) Christina Aguilera leaves her heart on the stage while performing during the 2013 American Music Awards held at Nokia Theatre L.A. Live on Sunday (November 24) in Los Angeles. The 32-year-old singer was joined on stage by A Great Big World while singing their latest single âSay Something.â. PHOTOS: Check out the latest pics of Christina Aguilera. Earlier in the day, Christina was glamorous white while walking the red carpet before the ceremony.