Hi :]

I heard a song in a club about 6 months ago and have yet to figure out who sings it... but I'd LOVE to know cuz its been stuck in my head ever since I heard it.

Its an R&B song, kinda slow tempo, female singing and the only lyrics I know are:
"I need someone...." then "Mmm mmm mmm. Hey hey heyyyy-ooh"

And I COULD be wrong about that, I was in a club... lol.

ANY HELP/SUGGESTIONS WOULD BE APPRECIATED!! Thanks!!