Justin Bieber "Music Mondays" continues with "All Bad"

The Biebs continues his lovely music Mondays with "All Bad"and let me tell it's it goes into the perfection category with all his other releases. But some are wondering who exactly who the song is about. Hmmmmm but anyways let me know how you feel about the song and who it is about so leave a comment below. 
http://www.youtube.com/watch?v=7P8t0QcGImk

Photo courtesy of Rap-up