I saw this video on VH1 maybe 5-6 months ago but totally missed the name of it.
It was sung by a woman, sounding quite indie and raw (i thought it was sounding rather tegan&sara-ish). The video was mostly a black and white except a few scenes of the singer's face, who I recall to be a blond one. She was shown from a distance with her guitar while singing and behind her there was nothing but a wall.
Plus, there were a few shots of people making out in a toilet room.