Taylor Swift and Selena Gomez reunited this week and proved that their rocky friendship isn't going to end anytime soon. The girls have been through so much during their seven years of knowing each other and it's crazy to see how much they've grown up!
They're not the only long-time celebrity besties we adore. Click through to see 10 then-and-now photos of more friends we love, then let us know in the comments below which friends' transformations blow your mind.
Taylor Swift and Selena Gomez met through the Jonas brothers.
Click the arrow to see them now.