Soul legend James Brown is scheduled to duet with Robbie Williams at soccer star David Beckham's lavish pre-World Cup party in May (06). The SEX MACHINE star plans to give Williams a run for his money with his famously fancy footwork at the bash, which will be held at Beckham's mansion in Hertfordshire, England. A source says, "It's going to be a blast. James Brown's representatives flew in to London this week for talks. "As soon as they sat down with David and (his ex-SPICE GIRL wife) Victoria they were given the full sales pitch about how big a night it would be. "James Brown is the perfect showman to make an appearance. "Robbie has signed up and loved the idea of taking the stage with Brown. "JB might be 72 but he still tours as hard as artists half his age - and he'll be more than a match for Robbie with his dance moves."