iHeartRadio Festival Announces 2012 Line-Up: Rihanna, Usher, Swift, Wayne [VIDEO]

Clear Channel announced the 2012 iHeartRadio Festival line-up today (July 9). Its second annual festival is set for September 21 and 22 at the MGM Grand in Las Vegas.

This year's line-up includes Taylor Swift, Aerosmith, Rihanna, Usher, Bon Jovi, Lil Wayne, Green Day, Swedish House Mafia, No Doubt, Brad Paisley, Pitbull, deadmau5, Miranda Lambert, Enrique Iglesias, Linkin Park, Jason Aldean, P!nk, Mary J. Blige, Calvin Harris and Shakira.

"This year it's set to be bigger and better, with an unbelievable roster of some of the most talented names in the music business," Ryan Seacrest told AP news.

"The bar was set high this year given the overwhelming success of last year's inaugural event and we are extremely pleased to have the opportunity to again deliver a diverse, extraordinary line-up of incredible talent to our listeners for year two of the iHeartRadio Music Festival," said John Hogan, Chairman/CEO of Clear Channel Media and Entertainment.

The tickets go on sale July 14. The concerts will be also aired on iHeartRadio.com and Clear Channel networks, AP reports.