"Baby Got Back" by Sir Mix-a-lot... The basic equasion goes like this: Barry White CD = Instant sex now, there are certain variables to factor in, such as the quality of the recording, amount of candles in the room, what day of the month it is, but basically that formula works almost all the time...
I third Brian McKnight. The dude's voice is amazing. I would recommend "Anytime" and "6, 8, 12." Usher is another good R&B singer.
I think that the entire "My Name Is Joe" CD by Joe is good especially "Stutter" - Double Take remix with Mystikal. Also alot of R Kelly like Bump N Grind, Honey Love, Sex Me, You Remind Me of Something, and I Can't Sleep Baby (my personal all-time favorite R&B song).
Alexander O'Neal - Crying Overtime, Lady Wayman Tisdale (the jazzman from the Phoenix Suns!) - Face to Face, Summer Breeze Dave Hollister - I'm Not Complete
Big Pimpin - Jay Z but seriously... D'angelo Ginuwine William deVaughn Roy Ayers Craig David any of these guys got it!