Anyone know the name of this song?

I only know a the chorus but it goes something like ... OoO baby grindin grindin grindin ... then OoO, OoO, OoO, Oo-OOOOOOOOOOOO!!! ... sounds kinda like usher but at the same time no ... anyone got an idea? lol i know this probably didnt help anyone ... its been bothering me all day