PICS & VIDEO: Jay-Z, Beyonce, Kanye West, Christina Milian, Taraji P. Henson, & More Ring In The New Year VEGAS Style

It was a memorable New Year's Eve for the Cosmopolitan Hotel party goers. The posh hotel opened its doors at the strike of midnight with a performance from Jay-Z, ColdPlay's Chris Martin, and "surprise" guests Beyonce, John Mayer and Kanye West. And their celeb friends like Taraji Henson, the Whitakers, Christina Milian, Brandy and more came out to party too.

We've got the clock striking party pics when you read on...

Hov hit the stage to perform with his bestie Chris Martin all night. ANd his little brother Kanye West and his denim jacket and bandana hit the stage as well.

And Beyonce hit the stage to perform "Halo" and "Young Forever":

She's still sounding fabulous.

Glasses were up on stage and off, and the crowd of course went nuts all night.

John Mayer came out to play as well.

Nice suit Hov.

This lady in front is CRUNK. I wouldn't be surprised if she flashed her boobs.

Gotta love Yeezy though.

Forest Whitaker and his wife Keisha spent New Year's together of course and hit the purple carpet for the event. they posed with a fab mini dress wearing Taraji Henson.

his is a different look for her...and I'm loving it. Who knew she had thse killer gams she rarely shows off?

Christina Milian got cutesy in a black and white cocktail tulle dress.

Mel B. donned her blonde extensions and hit the carpet with her hubby Stephen.

"Gossip Girl" Jessica Szhor was there.

And Brandy rocked another fab look last night in all black shimmer and great shoes.

Model Selita Ebanks rocked an interesting dress.

And actress Rashida Jones hit the carpet in some cute nude ankle-hugging shoes and a multi-colored sparkling dress. The feathery clutch looks cute as well.