Taylor Swift, Green Day among iHeartRadio Music Festival headliners

Taylor Swift, Green Day, Aerosmith and Rihanna are among the acts confirmed for the second annual iHeartRadio Music Festival, which will take over the MGM Grand in Las Vegas in September.

The Clear Channel-sponsored two-day festival, slated for Sept. 21-22, will be kicked off by radio personality Ryan Seacrest. The lineup also includes Usher, Bon Jovi, Lil Wayne, 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. More acts will be announced in the coming weeks, according to a press release.

Tickets for the mainstream music extravaganza are available now via the event's website.

"The iHeartRadio Music Festival is a unique celebration of music," Seacrest explained in a press release. "It's the biggest names in the industry coming together for an impressive weekend of live entertainment. The momentum, energy and music experience around the inaugural iHeartRadio Music Festival was incredible, and I'm excited to be a part of this must-see event."

iHeartRadio, the free online radio station spawned by behemoth radio owner Clear Channel, has garnered more than 10 million registered users as of May. The free application is available across multiple platforms, including web, mobile and gaming devices.