Beyonce and Chris Martin on the piano
Jay Z, Chris Martin and Kanye West
Floyd Mayweather, 50cent and Jay-z
Jay-z's $300 a bottle Armand de Brignac champagne
At the party were Rihanna, Gwyneth Paltrow, her husband Chris Martin, Kanye West, Jennifer Lopez, Florence Welch, 50cent, Floyd Mayweather and others.