Watch: Taylor Swift, Camila Cabello & Charli XCX perform 'Shake It Off' together live.

.@charli_xcx and @Camila_Cabello join @taylorswift13 on stage to perform Shake It Off! #RepTourGlendale #TaylorSwift #ReputationStadiumTour pic.twitter.com/zXyBhpZUpa

— Xposé (@TV3Xpose) May 9, 2018

.@taylorswift13 @Camila_Cabello & @charli_xcx on stage together in Phoenix! #ReputationStadiumTour (@GaryC30) pic.twitter.com/rkv6s1uCQE

— MCD Productions (@mcd_productions) May 9, 2018

Camila and Charli singing Shake It Off with Taylor! ( @lukasperry) #repTourGlendale pic.twitter.com/dAfx38ZWcX

— Taylor Swift News (@TSwiftNZ) May 9, 2018

we are officially shook cc: @Camila_Cabellothank u @taylorswift13 for tonight it was magic pic.twitter.com/FcmF7nx4LQ

— CHARLI XCX (@charli_xcx) May 9, 2018