The singer was spotted last night after the surfboard show having a B-day dinner with boyfriend Justin Bieber and small group of friends and family at Beverly Hills restaurant Il Cielo.
The two arrived on the "Boyfriend" hitmaker's customized Mercedes minibus. Hosted by Gomez's mom, Mandy, the dinner for 12 took place in the private back patio with the floor covered in rose petals to match the singer's pink Dsquared2 minidress.
The get-together started with cocktails (ginger ale for Gomez and Coca-Cola for Bieber!) followed by dinner and a flourless chocolate birthday cake topped with fresh raspberries and whipped cream.
"Selena was just a doll, so humble and sweet," restaurant owner Pattie Vericella said.
Last night's fete was nothing compared to the partying Gomez has been doing with older pals Vanessa Hudgens, 23, and Ashley Benson, 22.