Kanye West and his new gal-pal were there. Ditto Ryan Phillippe and Abbie Cornish. But there was one couple conspicuously absent from the House of Hype/Island Def Jam post-Grammys soiree at Wolfgang's Steakhouse.

Rihanna (who's part of the Def Jam roster) and Chris Brown.

A source tells E! News that Rihanna was in the hospital recovering from an apparent attack at the hands of Brown. And although she's so dinged up, she's likely to cancel her scheduled Friday concert in Malaysia, "she won't press charges against him because she's so in love with him," the source predicts.

As for Kanye, after performing at the Grammys with Jay-Z and M.I.A., he actually had props for someone other than himself...

He said watching Radiohead was the highlight of his night.

Joining Kanye's afterparty entourage was model Amber Rose, the same girl he's been seen out on the town with lately.

Another couple together on the carpet was Phillippe and Cornish, who arrived hand in hand at the party hosted by L.A. Reid and were by each other's side most of the night.

—Additional reporting by Whitney English