Lindsay Lohan and her alledged lesbian love Samantha Ronson kept the turntables blazing at an A-list bash for British newcomers David and Victoria Beckham over the weekend. “Rehab” from Amy Winehouse, John Mellencamp’s “Jack and Diane, and the Spice Girlsclassic “Wannabe” were staples on the playlist.

Posh got “really shy and did not sing along,” says a guest. “There was a shout out from the DJ booth, ‘Let’s hear it for Scientology!’”

Stevie Wonder entertained the crowd with a 15-minute set that included his hit “Signed, Sealed, Delivered.” “This is amazing! I can’t believe Stevie Wonder is singing!” Posh gushed.

Even Will Smith grabbed the mic for a classic freestyling session, before doing splits! “The look on Tom’s face was priceless!” the witness says.