Taylor Swift Features Katy Perry in Music Video for "You Need to Calm Down"

Taylor Swift just released the music video for her latest single, You Need to Calm Down -- and it features tons of her celebrity friends, including: Ryan Reynolds, Ellen Degeneres, Ciara, LaVerne Cox, the cast of Queer Eye, Adam Lambert, Ru Paul... the list goes on and on!

Perhaps the biggest surprise guest is Katy Perry, with whom T-Swift has officially made-up with. Check it out below!