iHeartRadio Music Festival, Las Vegas, NV (September 23-24, 2011)

It’s being billed as the “Biggest Live Music Event in Radio History,” though I’m not exactly sure I know what that tagline means. In any event the inaugural iHeartRadio Music Festival will take place from September 23-24, 2011 at the MGM Grand in Las Vegas, NV. Top of the bill headliners include Lady Gaga and Coldplay and the whole event will be streamed via iHeartRadio.com and their various mobile apps.

The event, while being marketed as traditional a music festival, will also serve double duty as a launch pad for the new version of the iheartradio website and its associated mobile apps.

I Heart Radio already allows you to listen to Clear Channel’s radio stations over the Web. The new version of the site, now in limited beta, with official launch in sync with the concert, will include a Pandora-like offering that will allow people to create customer radio stations. Bob Pittman, chairman of media and entertainment platforms for the company, said in an interview wit Forbes this afternoon that I Heart Radio’s new offering will include a 10 million-song music library, or about 10x the number of songs offered on Pandora. He says that the service at launch will be commercial-free through the end of the year; the company has no plans for a subscription-based version of the site, but instead sees it as an added feature of the existing site. [Forbes.com]

Tickets are currently on presale for both days of the festival and the password is IHRVEGAS. General on sale begins at 1PM ET on Saturday, July 16, via Ticketmaster.com.

View the full pop heavy iHeartRadio Music Festival lineup after the jump.

FRIDAY, SEPTEMBER 23, 2011:
Coldplay
Alicia Keys
The Black Eyed Peas
John Mayer
Carrie Underwood
Bruno Mars
Jane’s Addiction

SATURDAY, SEPTEMBER 24, 2011:
Lady Gaga
Jennifer Lopez
Steven Tyler
Kenny Chesney
Nicki Minaj
Rascal Flatts
Kelly Clarkson
David Guetta
Sublime with Rome
Special guest performances by Sting and Usher