WATCH: Amber Rose Backs That Thang Up on Chris Brown in the Club

Battle of the butts

Besties Amber Rose, 31, and Blac Chyna, 26, doubled up on Thursday evening as they enjoyed a night out at the Supper Club in Los Angeles.

Who else was in attendance? Chris Brown! ... And, there's a video floating around of Amber Rose backing that thang up on him! 

Amber is like... Hey Wiz ... miss this? Hahaa! 

I'm really not sure what to make of the video. I know they're just dancing, but Amber is good friends with Chris' ex Karrueche, so I thought. Amber and Chris are both single though. But hey, it could all be in good fun. 

Check out Amber and Chris dancing below. Can he handle all of that? 

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