Rihanna – Artists to Avoid in Las Vegas

Rihanna loves to party. And while she can be lots of fun on a night out, she has been spotted getting a bit messy. According to one report, she partied so hard in Vegas that she vomited at the nightclub -- not necessarily the classiest look from the 'Stay' singer.

So the next time you party it up on the Strip, it might be best to avoid bumping into RiRi unless you want to risk running into a mess.