She better be careful not to catch Bieber fever!

We had no idea Justin Bieber and Jennifer Aniston were friends, but we do now! The Canadian crooner shared a selfie with the actress on his Instagram account yesterday, and almost immediately fans began to freak out over their hang out! While there's a bit of an age gap, we would bet that if she wasn't already married, JB could win her over with his charms!

So how do the unlikely duo know each other? It sounds like The Biebs' ex Selena Gomez is the link!

The Oscar nominee and the "Come & Get It" songstress have been close since being introduced by their mutual management team earlier this year, so it seems the "Sorry" crooner is piggybacking on that friendship. The A-list beauty seems like she's friendly with everyone, but we can't picture her husband Justin Theroux being game for a double date with Jelena!