Rihanna Performing "Shut Up and Drive" LIVE on 21 July 2010 at the Staple Center in Los Angeles California. Apparently, her ass is eating her outfit...

Some say, these days to be a successful singer, no longer need a good voice but a good ass.

In other side, some even say that nowadays female singers need to dress like hookers.

But what I know here was, Rihanna is performing live in this video!