Justin Bieber Treats Austin Mahone to Dinner for 18th Birthday!

Justin Bieber and Austin Mahone make their exit out of Nobu following dinner with their friends on Thursday evening (April 3) in Miami Beach, Fla.

The guys all celebrated Austin‘s 18th birthday – he will be turning legal TOMORROW (April 4). Happy birthday!!!

Austin, who is in town recording music with Justin, has a big surprise coming in the morning for his fans and we can’t wait to find out what it is.

“I HAVE A HUGE SURPRISE FOR YOU GUYS!!! I’ve been working on this for soooo long😁 I do it all for you guys😊 and its finally time to tell you all about it!!!!” Austin tweeted. “TUNE IN TO @ElvisDuranShow at 7 AM EST TOMORROW OR STREAM ON @iHeartRadio TO FIND OUT EVERYTHING!! #AustinOnElvis @elvisduran @Z100NewYork.”

20+ pictures inside of Justin Bieber and Austin Mahone out for dinner…