It's Justin Bieber's 23rd birthday today. He's been lucky enough to date some pretty awesome women over the years. Hopefully, all of his exes sent him a nice shout out on his big day. We're taking a look back at all his relationships over the years. 

1) Selena Gomez

2) Sofia Richie

3) Barbara Palvin

4)Adriana Lima

5) Miranda Kerr

6) Hailey Baldwin