Austin Mahone and Justin Bieber have been spending a lot of time together since announcing they have an exciting collab coming out. Luckily, they took a break from the studio and went out to celebrate Austin's 18th birthday.

The two stars were spotted having dinner with their friends at Nobu in Miami, Florida, last night. Even though it was a little early, they must not have been able to wait for the "MMM Yeah" singer to blow out his candles!

Check out the pics of Austin and Justin's birthday outing below then let us know what you think about them hanging out in the comments!