This is your LAST CHANCE to win tickets to the the SOLD OUT iHeartRadio Music Festival in Las Vegas on September 20 and 21st! We'll even throw in plane tickets and a hotel stay! The complete package!

To win your way into the iHeartRadio Music Festival, answer the following question: Which act from the 2013 lineup has performed in a previous iHeartRadio Music Festival?

Need a hint? Here are the acts from the 2011 Festival, 2012 Festival and the 2013 Lineup. Best of luck! 

This contest has ended.