One Direction and Justin Bieber aren't the best of friends recently, since Justin slagged the boys for having the same album release date. 

But since then, JB has insisted that it's all cool. And if there's one way to let bygones to be bygones, it's by mashing up their songs.

Not that the lads put it together themselves, but fans on both sides will be happy since You're Perfect and Sorry go together SO well.  

It's the perfect collaboration.