Taylor Swift borrows Ryan Reynolds' Deadpool costume and more stars dressing up for Halloween

1/57

Taylor Swift borrowed Ryan Reynolds' Deadpool costume from his Marvel flick for a Halloween party in NYC with her girlsquad, which included Martha Hunt, Gigi Hadid, Lily Donaldson and Camila Cabello. Photo: Instagram/@taylorswift

2/57

Scout's honor! Gigi Hadid opted for a girl scouts costume while her best friend Taylor Swift channeled her inner superhero as pal Blake Lively's husband's Marvel character, Deadpool. Attached to the Polaroid snap, the 1989 singer wrote, "Thanks @vancityreynolds for this costume, you're the BEST deadpool inside contact ever." Photo: Instagram/@TaylorSwift

3/57

If you say her name three times, she will appear! Victoria Justice put her own spin on the Beetlejuice look during the Just Jared Halloween party sponsored by Maestro Dobel Tequila in L.A. Photo: Owen Kolasinski/BFA.com