No one can watch Grease and not sing along — not even pop stars!
Certainly not Taylor Swift, who sang through her entire three-hour broadcast of FOX's Grease: Live! with bestie Gigi Hadid!
Taking to Snapchat, Gigi shared a video of herself and the Wildest Dreams songstress channeling their inner Sandy!
Related: Celebs React To Grease: Live!
In the clip, Tay and Gigi both sing along with Julianne Hough as she belts out the words to Hopelessly Devoted To You!
Taylor is SO into it! Or maybe she's just auditioning for next time..? LOLz!
While the duo certainly got into it for this song, we aren't sure if they were singing as passionately when their mutual ex Joe Jonas performed later on with his band DNCE!
Watch the celebs watching the performance (below)!