Christina Aguilera poses with Selena Gomez and Karol G at Selena's star-studded 31st birthday bash

Selena Gomez Celebrates 31st Birthday With Paris Hilton, Christina Aguilera, Saweetie & Private ‘Barbie’ Screening

Selena Gomez exudes Barbiecore in a vibrant pink minidress and goes BAREFOOT during her 31st birthday dinner in West Hollywood

Selena Gomez Is a Real-Life 'Barbie' for B-Day Movie Screening With Sister