The two form a cozy team for clubbing. Plus: Mariah, Ashlee, Tobey and more


Mariah Carey's multi-octave voice stops Jay-Z in his tracks during their duet of "Heartbreaker" at her sold-out show at New York City's Madison Square Garden on Wednesday. The Jigga Man wasn't the only special guest at the concert: Sean "Diddy" Combs and a gospel choir from True Worship Church of East New York also hit the stage.