The iHeartRadio Music festival opens tonight at the MGM Grand in Las Vegas, and will feature performances from Taylor Swift, Aerosmith, Rihanna, Usher, Bon Jovi, Brad Paisley, Lil Wayne, Green Day, Swedish House Mafia, No Doubt, Pitbull, deadmau5, Miranda Lambert, Calvin Harris, Enrique Iglesias, Linkin Park, Jason Aldean, P!nk and Mary J. Blige. This week superstar performer Shakira bowed out of the 2-day event, announcing she's pregnant.
Also this week Yahoo! announced it will stream the concert live in HD. The show will also be broadcast on Clear Channel radio stations and streamed to the Xbox.
It's the second-annual iHeartRadio concert. The first coincided with the launch of the Clear Channel-owned Internet and mobile radio initiative, iHeartRadio.