Gigi Hadid's life is far from "normal," but sometimes even supermodels have to play the role of third wheel...with Taylor Swift and Calvin Harris, that is. 

Over the weekend, the blonde bombshell celebrated her 21st birthday in style, starting with a family trip to the beach with beau Zayn Malik. The A-list couple spent the day hiking and swimming and snapping photos with family and friends. 

The three-time SI Swimsuit model continued her celebratory weekend with a night at Coachella alongside Taylor Swift and her boyfriend, Calvin Harris. Gigi posted Snapchats of the three of them on a private jet on the way to the California-based music festival, during which time her BFF presented her with a precious cake. 

A little later in the night, Gigi called herself out for playing the role of third wheel on the A-list couple's night out. 

[tweet: https://twitter.com/TSwiftPR/status/724495191856566272]

It's official then—even when you're famous, you can't always avoid being the third wheel. 

BONUS: See some of Gigi's best moments from SI Swimsuit 2016!