As the stage slowly spun around to face the crowd, the Arena went crazy and Justin Timberlake brought "Sexy Back"...literally! JT opened his set with the hit song and the crowd went crazy.


PHOTOS: Justin Timberlake at the iHeartRadio Music Festival 2013 

Among the set Timberlake sprinkled in fan favorites like "Cry Me A River" and "Holy Grail" but nothing came close to "TKO." Timberlake performed his latest single for the first time EVER at the iHeartRadio Music Festival and to his surprise the fans already knew the words and were singing along! 

Justin Timberlake debuted two additional songs during his set at the iHeartRadio Music Festival: "True Blood" and "Only When I Walk Away." Both songs are off of Timberlake's upcoming album, The 20/20 Experience (2 of 2), out September 30th. Could "True Blood" be a reference to the TV series?  

It's not until you see Justin Timberlake perform live that you realize he is a hit making machine (and a dance machine). His performance at the iHeartRadio Music Festival is one for the books and hands down the best way to close out the biggest music event in radio history!