There's something satisfying about seeing really cool people hanging out together. Maybe it's the fact that we can imagine chilling with them. Or maybe it just makes us feel good to confirm that two people we consider cool also consider each other cool. In fact, there's a whole Tumblr dedicated to Awesome People Hanging Out Together, where movie stars, artists, politicians, musicians, and just about everyone in pop culture you admire spends time together. The same goes for our favorite artists, but their hangouts serve as explosions of creative energy. Whether they're really good bros, actual brothers, or even lovers, these are The Coolest Artist BFFs Of All Time. We wish our friends were this cool.