The New York Daily News reports that Rose—the on-again, off-again girlfriend of Humblest Rapper Ever Kanye West—got extremely cozy with Chris Brown at Sean "Diddy" Combs' White Party in Beverly Hills on Saturday.

Brown, of course, recently copped a plea in his assault case against him for allegedly beating up his ex-girlfriend Rihanna.

According to a witness, Brown showed up to the party with Rihanna doppelgänger Teyana Taylor, but quickly took a shine to the bald fashion model.

"Diddy announced the deejay would do a tribute to Michael Jackson," squeals a guest. "Chris did an amazing impression of Michael's moonwalk. It wasn't long before he was dancing with Amber."

Before too long, "they were holding hands and making out in the shadows," said a witness. "She had her hand on his leg." As the party wound down, Brown and Rose took their love-fest to Guys nightclub. "They were kissing on the dance floor in front of Teyana," an onlooker reveals. "But he and Amber left separately."

Uh-oh; hopefully Kanye doesn't get wind of this. After all, the guy's been known to have a little bit of a temper himself.

Check out a video of Chris Brown working his killer moves at Diddy's White Party below:

We ask you, what woman could possibly resist that kind of ultra-smoothness?

Let us know in the comments section: Do you think that Chris Brown and Amber Rose would make a good couple?