Justin Bieber attended Tori Kelly's Unbreakable Smile album release party at The Nice Guy in Hollywood on Thursday night, and not only did the pop superstar party with fellow singers Ed Sheeran and Megan Trainor, but SELENA GOMEZ was there too!

Selena didn't stick around for too long once Bieber arrived, but the starlet knew her ex was going to show up -- after all, Bieber's manager Scooter Braun was throwing the party for Tori! Talk about playing with fire! Either Selena is totally over Biebs and cool with him being around, or she's still not over him and she's hoping to rekindle their romance. Hmm, which one do YOU think it is?

Selena left with Ed and the two stopped by a local 7 Eleven to grab snacks before heading back to her home. When Justin was ready to leave, he darted out of the club and went straight to his car. We're DYING to know what's going on between these two -- you know Jelena will never die!