We love representing our fave fandoms with cool concert tees, but tons of stylish celebrities have even supported their fellow A-listers in the form of stylish t-shirts! We love that Niall Horan has become a fan of rocking 5 Seconds of Summer merch and Harry Styles promotes his friend Ed Sheeran with trendy gear, but these guys aren't the only ones to sport the fun trend!
Justin Bieber once wore his on-again-off-again girlfriend Selena Gomez's tour top, and Cody Simpson professed his love for Rihanna's music through his wardrobe. Katy Perry, Zendaya, Demi Lovato and more of our favorite musicians and actors have tried the unexpected trend, too.
Check out more stars wearing other celebs' faces in the above gallery. Whose shirt surprised you most? Let us know in the comments section below!