Chris Brown was reportedly spotted making out with model Amber Rose, the on-and-off girlfriend of rapper Kanye West, at the July 4 White Party thrown by Diddy and Ashton Kutcher in Beverly Hills over the weekend.

Spies tell The NY Daily News that although Brown arrived at the party with singer Teyana Taylor, an 18-year-old Rihanna look-alike, he quickly hooked up with Rose.

“Diddy announced the deejay would do a tribute to Michael Jackson,” says a spy.

“Chris did an amazing impression of Michael’s moonwalk. It wasn’t long before he was dancing with Amber.”

“They were holding hands and making out in the shadows,” adds another witness. “She had her hand on his leg.”