Katy Perry has mastered countless hair shades and looks so of course she has her own COVERGIRL campaign. Her expert modeling for the cosmetic brand has been well-documented here, but her latest ad is her boldest yet. To rep COVERGIRL's new Super Sizer mascara, Katy brought back her slime green hair and nose ring.

What's most striking about the ad, though, has to be Katy's eyes, which is another reminder that aqua eyeliner should be on your to-try list. (It's definitely having a ~moment~.) According to the campaign's makeup artist Pat McGrath, the look is a lot easier to get than you might think.

"I used Katy's gorgeous eyes combined with the brilliant colors of the COVERGIRL eyeshadow quads as my inspiration," she told Allure. "By combining a dramatic eyeliner (Intensify Me!) with pops of color and creating larger than life lashes (using The Super Sizer Mascara by LashBlast) her eyes instantly became the focal point and a major wow-factor. She looked amazing!"