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Carrie Underwood, Kenny Chesney and Rascal Flatts are set to represent country music during the iHeartRadio Music Festival, the biggest live music event in radio history. The superstar performers will share the Las Vegas MGM Grand stage with pop heavyweights Lady Gaga, Kelly Clarkson, Coldplay, Alicia Keys, Steven Tyler and more for the historic two-night event.

Music fans will unite in Las Vegas to celebrate the launch of the new iHeartRadio radio, out this fall. Fans who can't make it to Sin City for the one-of-a-kind concert can catch all the exclusive performances streamed live through iHeartRadio.com and the iHeartRadio application on both the iPhone and iPad.

Might Carrie reprise her sizzling on-stage duet with the Aerosmith frontman? Tune in September 23 and 24 to find out! Click here for ticket availability.

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