What is the name of this popular r&b song?

I feel dumb for not knowing the title, because i have heard the song on the radio before but it has been awhile. It is a popular song and it may be a remix. All i know is that in the beginning, someone says "well, i don't do this very often.." and then the beat drops. It sounds like maybe Usher or R Kelly but I'm really not sure. The chorus is about partying on the weekend. Thanks so much.