E! Online - "Hot N Cold" singer Katy Perry's relationship with Travis McCoy of Gym Class Heroes is officially on ice. A source close to the couple has confirmed to E! News that the two called it quits just before New Years.

Gym Class Heroes have announced details of their arena tour alongside Lil Wayne.

Ah, hubris, where would Lil Wayne be without you. The self-proclaimed (though not totally deluded) "best rapper alive," fresh off his recent forays in the worlds of twang and comedy, has filled in the rest of his so-called "I Am Music" tour he shares with T-Pain, Gym Class Heroes, Keri Hilson, Keyshia Cole, and Heather McIntosh of the Instrument...

The tracklist for Lil Wayne's previously mentioned and oft-discussed Dedication 3 mixtape has surfaced via an MTV.com interview with DJ Drama, Wayne's partner on the Dedication mixtapes. Hey, maybe that "You guys, I'm releasing a new Carter III with all new tracks" announcement a few weeks ago was just a matter of Lil Wayne getting his trilogies...

But he's not the only one. "What A Catch, Donnie," the third single from the band's forthcoming fifth studio album Folie à Deux features a whole case of characters singing lines from various Fall Out Boy songs. In an especially meta move, Costello handles Folie's second single, "Headfirst Slide Into Cooperstown On A Bad Bet." Other crooners inc...