*Jay-Z is joining the lineup of Clear Channel’s first-ever iHeartRadio Music Festival, hosted by Ryan Seacrest and featuring such performers as Nicki Minaj, Alicia Keys, the Black Eyed Peas, Bruno Mars and Jennifer Lopez.

The rapper will perform without Kanye West, his collaborator on their new album, “Watch the Throne.” He’ll close out opening night of the two-day fest, which takes place Sept. 23-24 at the MGM Grand in Las Vegas.

The lineup also includes Lady Gaga, Coldplay, Steven Tyler, Kenny Chesney, Carrie Underwood, Jane’s Addiction, John Mayer, David Guetta, Rascal Flatts, Kelly Clarkson, Sublime with Rome and special performances by Usher and Sting.

The event is intended to celebrate the launch of the New iHeartRadio, Clear Channel’s digital radio product. It sold out 10 minutes after tickets were put on sale to the general public.

Live audio and video streams of the iHeartRadio Music Festival will be available online, via mobile devices at www.iHeartRadio.com and across all of Clear Channel’s radio station websites.