Shocking :Rihanna 's derriere grabbed by A$AP during MTV VMA's

This picture is making tongues wag as it shows Rihanna's ass being grabbed in the full glare of camera's during her performance at MTV VMA's.She performed with upcoming Rapper A$AP. 

What is funny is, Chris Brown was seated in front row and probably saw this.

Wow!

Maybe it was just part of the performance..but that grab eh.DISRESPECTFUL