Nine high school girls (clockwise from left: Rose, Star, Paulina, Jazz Fenton, Valerie Gray, Julie Yamamoto, Jessie Bannon, Sam Manson, and Gwen Tennyson) sit on the steps of the front door of their school, wearing their sexy half-face gas masks.
Art:

Gwen Tennyson & Julie Yamamoto© Cartoon Network
Jessie Bannon © Hanna-Barbera
Sam Manson, Jazz Fenton, Valerie Gray, Star, Paulina © Nickelodeon
Rose © Disney
Sam Manson: "And I wear this gas mask not only for goth fashion, but to do laundry and garbage."
Jessie Bannon: "And I wear this gas mask to ride through very stinky mangrove swamps."
Rose: "And I wear this gas mask to descent skunks using tomato juice and stuff."
Julie Yamamoto: "And I wear this gas mask in case smoke from a nearby forest fire surrounds my hometown, including the tennis court."
Star: "And I wear this gas mask when I clean up stinky cat urine."
Paulina Sanchez: "And I wear this gas mask when I use stinkbombs as pranks against Danny and Sam."
Jazz Fenton: "And I wear this gas mask every time I fart."
Valerie Gray: "And I wear this gas mask to go through foul-smelling sulfur gas every time I past lakes in zoos, including the Amity Park Zoo."
All: "And all our gas masks are perfect!"
I'd like someone to commission that!