There are a lot of people in this world who can sing and play the piano and guitar. Hell, I sing and play the

piano and guitar. But there's something different about Bruno Mars. He has a musicality, a presence in

his voice that I've never heard from anyone else.

Bruno, 25, is part of this new wave of musicians who can do everything: sing, play, write, produce. When

he performs live, nothing is prerecorded or fudged. It's a straight-up, classic performance. That's so rare

these days. We needed only two sessions to record "Nothin' on You." But when we perform live is when

you really see our chemistry in action. And I can't even tell you how many times he's made my stomach

hurt from laughing so hard. Bruno is hilarious. You can see it in the hit song "F--- You," which he wrote for

Cee Lo Green. That's him; that's his sense of humor.

Bruno has so many things open to him now, so many doorways he can walk through. Even I don't know

what he'll be up to next.

B.o.B is a rapper, singer, musician and record producer