The champagne was in full flow as Jay-Z hosted a New Year party in Las Vegas which was bubbling with some of the biggest stars in the entertainment industry. Joining the rapper was his wife Beyonce, along with Rihanna, Gwyneth Paltrow, her husband Chris Martin, Kanye West, Jennifer Lopez and Florence Welch.

The stars were out in force for the grand opening of The Cosmopolitan, a $3.9 billion hotel on the famous Strip. Following a gig, which included performances from Beyonce, Jay-Z, and Coldplay’s Chris, the celebs partied until the earlier hours at the Marquee Nightclub in the hotel.


Beyonce, 29, duetted with her 41-year-old husband to perform Forever Young and also teamed up with Chris to sing her hit Halo, wearing a stunning low-cut dress.
John Mayer also made a surprise appearance, playing guitar with Jay-Z on his song 99 Problems. Kanye West took over the DJ boot at 2.30am and was joined by Jay-Z as they sang Runaway followed by Monster. And not wanting to miss out, Rihanna performed her new track What’s My Name, looking glamorous in a red dress which matched her hair.
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Other guests included Cameron Diaz and A-Rod, who jetted in fresh from their holiday in Mexico.