After the star-studded event and after-party, Taylor went back to her hotel room and enjoyed some pizza with her friends, the girls from Haim, who also sported onesies. Tay captioned the cute pic, "After the after party is.. Well.. This. @haimtheband.”

Earlier in the night, Haim wore Rodarte on the red carpet at the gala, which celebrated the opening of the Manus x Machina: Fashion in an Age of Technology exhibit.

Taylor’s other pal Sarah Hyland had a onesie party of her own with Jennifer Lopez around the same time. Jennifer’s boyfriend Casper posted a video and wrote, "Animal onesie Dance party with @treveinhorn @therealsarahhyland #quinten @abbienormal9 @jlo & @nicolescherzy