After the celebrity lost all control in Las Vegas, Jason Derulo's name became a trending topic on social media and reportedly attacked two men who mistakenly thought he was Usher.

Then the singer puts the Usher Verzus rumors circulated around for quite some time to rest. Usher revealed something people do but probably won't tell.

Who's the biggest tipper? Who's the most diva? Who's the nicest? Celebrities make headlines for whatever reasons. Whether they tip big or only paid for their meals with an autograph, many people wants to know how these celebrities, behind-the-scenes, interact with waiters and waitresses.

Usher and Grace Miguel kept it together while he was accused of giving a woman a sexually transmitted disease. Then, why are they calling it quits?