Jamie McCarthy/Getty Images for iHeartMedia
Mad for Plaid
The singer showcases one of her favorite patterns.
Jason Merritt/LP5/Getty Images for TAS
Sexy Garters
The singer showcases a sizzling lingerie-inspired style at her show at Heinz Field in Pittsburgh, Pennsylvania.
Larry Busacca/LP5/Getty Images for TAS
"Bad Blood" Mini-Reunion
The singer walks a mock catwalk with BFFs and music video co-stars Victoria's Secret supermodel Martha Hunt and model Gigi Hadid.
Larry Busacca/LP5/Getty Images for TAS
Breaking Out the Big Guns
The singer smolders in a black, glittering strappy crop top and high-waist black shorts as she belts out "I Knew You Were Trouble."

