In honor of the ultimate Disney Channel heartthrob's birthday, we decided to take a look back at all of his relationships, romances and flings. From Vanessa Hudgens to Taylor Swift, we've dug through his past love life and figured out where are all of his ex girlfriends now!

And not just where they are now but WHO they are actually dating now. Of course, some are single but others are having babies and in long term relationships that you may have totally forgotten about!

Click through the gallery and let us know which girl Zac should have never broken up with in the comments below!