The line-up of this year's "TODAY" show's summer concert series has been announced. Lady GaGa, Justin Bieber, Ke$ha, Christina Aguilera and Carrie Underwood are some of the musical guests listed on the bill.
Dubbed "Toyota Concert Series on Today", it will be kicked off on May 14 with Sting as a performer. In one of the May gigs, the winner and runner-up of "American Idol" season 9 will make a special performance on date 27. Also, there will be another special gig from Christina on June 8 to play a full half-hour concert to celebrate the release of her new album "Bionic".
Other musicians slated to rock the annual event are The Script, Rascal Flatts, James Taylor, Carole King, Maxwell, Maroon 5, Enrique Iglesias, John Mayer, Train, Keith Urban and Katy Perry.
"Toyota Concert Series on Today" line-up: