The 21-year-old singer, who recently cancelled a string of planned appearances amid claims he needed a break from his hectic schedule, stopped by the 901 Bar and Grill at the University of Southern California (USC) and bought drinks for a number of people, reported Female First.
Fans took to social media to share pictures and videos with one person writing, "When @justinbieber buys you shots at the 9-0 #FightOn" and another added, "@justinbieber went to the 9-0 at USC tonight after performing with @TheChainsmokers at The Shrine and I can't even."