Katy Perry Shows off Thong and Back Tattoo in 2-Piece Dress at Billboard Women in Music [Photos]

Katy Perry put her backside on display at the Billboard Women in Music event on Wednesday, March 6, wearing a two-piece outfit with a skirt that laced up the back. It displayed a black string thong and part of Katy’s bare backside in cheeky photos.

The “Roar” singer, 39, smiled and posed as she also showed off a flesh-toned prosthetic butterfly tattoo on her lower back. Katy credited special effects makeup artist Hugo Villasenor in photos of her look posted to her Instagram page.

Katy’s outfit from the front was just as sexy, as she bared part of her abs in the strapless red corset top with a slight peplum, while the sides of the thong were visible over her hips. The back of the top featured the same lace-up pattern as the skirt, as the American Idol judge was feeling herself!

Katy bared part of her behind as the black string thong didn’t cover anything under the lace-up skirt.

The “Daisies” singer’s nude-hued butterfly prosthetic tattoo was an interesting touch to her lower back.

The two-piece red ensemble’s design had an open lace-up style going from the back of her knees all the way to the edge of her corset top.

Katy wore large black platform heels for extra height.

The “Firework” songstress’ red two-piece outfit looked much different from a front angle, as none of the lace-up work was visible, although Katy flashed a hint of her bare stomach in between the skirt and peplum feature on her top.