iHeartRadio Music Festival: Get the details

Ryan Seacrest announced the line-up for the 2012 iHeartRadio Music Festival Monday morning. The biggest live music event in radio history is back, and this year it's even bigger and better!

Watch the announcement:

Check out the list of performers who will take the stage at the MGM Grand Garden Arena in Las Vegas September 21-22 for the iHeartRadio Music Festival below!

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

Pink

Mary J. Blige

Calvin Harris

Shakira