AMERICAN IDOL host Ryan Seacrest announced this year’s “Wango Tango 2011” line up. Photo courtesy: Tony Duran / FOX.

Ryan Seacrest has announced the line up for this year’s Wango Tango 2011.

The all-day concert – courtesy of KIIS FM in Los Angeles, will feature live performances by: Ke$ha, Pitbull with Jennifer Lopez, Selena Gomez, Lupe Fiasco, T-Pain, Jason Derulo, Far East Movement, New Boyz, Cobra Starship and newcomer Cody Simpson.

Seacrest will host the yearly musical extravaganza, but guess what? He’ll be joined in his hosting duties by special guest host, Britney Spears!

Wango Tango 2011 takes place at the Staples Center in Los Angeles on May 14th. Tickets go on sale Friday, April 1st, 10:00 a.m. PT for KIIS Club VIP Members. The remaining tickets (if there are any) will go on sale to the public Saturday, April 2nd, 10:00 a.m. on the KIIS FM website www.kiisfm.com, or through Ticketmaster.com and Charge-By-Phone (800) 745-3000.