Despite his good boy image, Joe Jonas was quite the heart breaker when he ditched girlfriend Taylor Swift for a new love. While Biebs' track record is still squeaky clean, he's knocking Joe out of the box.
After a failed engagement and later being accused of cheating on former girlfriend Amber Rose, Justin Bieber's got Weezy beat in the romance department.
Though rumored to be on the brink of marriage, Weezy doesn't have the best record with relationships. With a handful of baby mamas, Wayne's definitely not a competitor in the best boyfriend competition against Justin.
Eminem is known to vent about his tumultuous past relationship with violent and borderline disturbing lyrics. Justin Bieber could give Em a few pointers on how to love a little more and hate a little less.
Though Breezy's still on the road to redemption, he hasn't managed to clear his name of all of his former relationship woes. While it seems like CB's been a mentor to Biebs in the music area, Biebs could probably hop into the mentor spot to make sure his homie learns how to be the best boyfriend.