I expect you to know the dude singing but do you know who the gal is?

Obviously, if you are from 'thatsite' (having the same tastes sucks but eh..it happens) , you know or have seen the post. Those of you not from there though, care to garner a guess? I mean, is it any wonder that I am not impressed with the Trey Songz of the World? @ me liking this.