Jay-Z Ring In 2011 With 50 Cent, Floyd Mayweather, Kanye & Diddy [Video]

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Rap mogul Jay-Z rang in the new year over the weekend with special help from entertainment celebrities 50 Cent, Floyd Mayweather, Jr., Diddy, Kanye West and others in Las Vegas.

Jay’s New Year’s Eve after party was filled with high profile guests. Kanye West did his best to steal the show from Jay-Z, who rocked Las Vegas at the celeb-packed New Year’s Eve party.

West turned up at the lavish opening of the $3.9 billion Cosmopolitan Hotel at the last minute — then crashed the show by Jay-Z, who along with Coldplay was paid up to $2.5 million to perform as a headline act. Other stars were happy to support the headline acts. John Mayer played guitar, and Chris Martin later returned to play piano for Beyoncé.

The party moved on to Club Marquee where Beyoncé, Jay-Z, 50 Cent, West, Floyd Mayweather, Rihanna, Sean Combs, Gwyneth Paltrow and Chris Martin, Alex Rodriguez and Cameron Diaz held court.

Prior to the event, Jay and company rocked fans into the new year with a Vegas show.

Peep video below