( 4UMF NEWS ) A$AP Rocky Grabs Rihanna‘s Butt:

Mental note to self: Do not go to a club with Drake, Chris Brown or A$AP Rocky.

The Harlem rapper made a bold gesture last night towards the end of his appearance with sexy singer Rihanna during their MTV VMA performance by grabbing her booty and planting a kiss on her neck.

Uh-oh…