On Sunday, Nov. 20, Selena Gomez, Nicki Minaj, Katy Perry and Taylor Swift all hit up the Nokia Theatre in Los Angeles for the 2011 American Music Awards. Towards the end of the show, BFFs Selena and Taylor posed for some silly pictures with Nicki and Katy.

Despite the fact that the girls were wearing high-end couture and had their makeup and hair done to perfection, that didn't stop them from making goofy faces for the cameras. Gomez and Perry even blew some bubbles with their gum. The photogs caught the 19-year-old 'Love You Like a Love Song' songstress blowing a bubble as Perry's bubble burst just before the flash went off! Gomez for the win!

As Gomez and Perry were busy practicing their bubble-blowing skills, Minaj and Swift were making goofy faces for the shutterbugs gathered around them. Ms. Swift looked on at her wacky musical counterparts with a funny, confused expression as the Harajuku Barbie pulled another crazy face maneuver in the middle of the group.

Girls really do just want to have fun -- even when they're some of the most famous people on the planet!