Everyone knows you can't choose your family, but you can choose your friends.

And in a world ruled by bloodlines and bank accounts, it pays to have a pal.

As much as a BFF can make you go, “WTF,” there’s no denying we’d all be a little less rich without them.

And Serena and Blair? They do besties better than anyone.

No, that’s not a tear in my eye, it’s just allergies. Without you, I’m nothing.

—Gossip Girl.