Hollywood's biggest A-list stars cut a rug at the Welcome to America party thrown for Brit imports David and Victoria Beckham on July 22. Hosts Tom Cruise and Katie Holmes dominated the dance floor and made out all night in front of guests like Ashton Kutcher, Demi Moore, Eva Longoria, Matthew Perry and David's teammates on the LA Galaxy. "They could hardly keep their lips off one another," one witness tells In Touch. While DJ Samantha Ronson spun, co-hosts Will Smith and Jada Pinkett Smith sweated up a storm on the dance floor, while circles formed around Katie and Tom, who leapt into the air and did the splits on the floor. David and Victoria were attached at the hip all night, and she whispered sweet nothings in his ear.