The easiest way to see the hottest acts in concert this summer -- just turn on your TV.
Justin Bieber, Ke$ha, Christina Aguilera, Lady Gaga, Carrie Underwood, Katy Perry, whoever wins "American Idol" and many more have all been added to the "Today" show's summer concert lineup.
The series kicks off May 14 -- check out NBC for who's playing when.
