Are Justin and Niall BFFs?

The rumors are true- Justin and Niall have become close! After the VMA's, the two hung out at JB's house and cooked, with JB tweeting, "Guys' night in full effect." Niall reveals, "I would call Justin a friend, someone I hang out with." Justin adds, " We have a great time together. I went over to Niall's house the other day. We had a little jam session and this guy shouted, 'Keep it down!"