According to several pictures from our pals at Pacific Coast News, Sel and her BFFs hit up L.A.'s Roosevelt Hotel Saturday night to celebrate her big day.
Although her supposed boyfriend, Justin Bieber, wasn't there, he was reportedly on her birthday cake!
Selena's birthday cake was reportedly brought out to her by her friend and actress Lily Collins. It was covered with leopard print and personal pics!
Although we can't really tell from the pics we have, others are saying it's DEF Bieber 's face on Sel's cake. What do you think?
Sel wasn't the only one celebrating that night. Her pal Julianne Hough was partying at the same place for her birthday too!
Click to check out the new video Selena just released for her b-day!