Who knows this song?

In a Turbo Kick boxing class that I take at 24 hour fitness there is song in the current round I don’t know the title or artist can anyone help please!! It is a up tempo pop possibly R&B song sang by a woman who sounds pretty young. Okay below is how a little bit of the song goes.

come with me baby and share with me your secrets and doubts.
(then she repeats over and over something like) Whatcha do about it whatcha do about whatcha do about it.

And then in one part she says over and over
Uh uhuh uh uhuh uh uhuh uh

Okay I realize how rediculous that looks typed out but hopefully someone will be able to help me!

http://music.yahoo.com/lyrics