Richard Young/Startraksphoto
Leah Abrahams
Oct 06, 2011 @ 5:55 pm

Hollywood royalty Gwyneth Paltrow and Cameron Diaz rubbed shoulders with Prince Philip, Duke of Edinburgh at the re-opening of Mayfair's members-only hot spot The Arts Club in London. After posing for photos, Paltrow hit the stage to belt out a few songs with Mark Ronson and The Knights Before. Click through to see more stars at last night's hottest events!

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