Cameron Diaz enjoyed a wild night out in Las Vegas with a mystery man on Saturday. The 'Charlie's Angels' star - who was most recently romantically linked to 'Wedding Crashers' actor Bradley Cooper - partied at the Mirage casino's Jet nightclub with a tall, dark handsome stranger.A fellow clubber said: "Cameron was really letting her hair down, she was having a great time. They were knocking back drinks and going crazy on the dance floor."As the night went on they got more and more touchy. "The couple partied until 1am before heading to the hotel's craps tables to try their luck for a couple of hours.Cameron, 35, was in town to film scenes for her new movie 'What Happens in Vegas' with Ashton Kutcher.On Sunday night, she headed to hip restaurant Nobu for dinner with a group of friends. Cameron split from long-term love Justin Timberlake in January and has since dated surfer Kelly Slater and magician Criss Angel.Justin is now dating 'The Illusionist' star Jessica Biel.