Clear Channel’s iHeartRadio Music Festival announced today that Sir Paul McCartney will be joining the lineup for the September 20 and 21 performances at the MGM Grand Garden Arena in Las Vegas.

The two-day event, which will be broadcast live across Clear Channel radio stations in 150 markets across the country as well as airing a two-night special on the CW on Sept. 30 and Oct. 1, already boasts Justin Timberlake, Katy Perry, Drake, Elton John, Muse, Tiësto, Chris Brown, Keith Urban, fun., Bruno Mars, Phoenix, Zedd, Maroon 5, Tim McGraw, Ke$ha, J. Cole, Miguel, Thirty Seconds to Mars, Benny Benassi, and Queen with Adam Lambert. Other special surprise guests are expected, and Ryan Seacrest will host.

Fresh off reportedly thrilling performances at the Outside Lands festival in San Francisco and a concert in Winnipeg, maybe McCartney will show the kids a thing or two at iHeartRadio. Tickets are sold out but the festival website includes a "win your way to Las Vegas" contest.