Why Katy Perry Bleached Her Brows For the "This Is How We Do" Video

To get the most definition, Bailey applied black eyeliner pencil to the lash line and waterline underneath the upper lid. He also pressed liner between the lashes and used CoverGirl Bombshell Intensity Liner ($9) to draw the "Katy cat eye."

He then added the Katy Perry for Eylure Lashes in Oh, My ($7) to her natural lashes, swiping on a few coats of mascara to blend. This eye look served as the foundation for every other look. Bailey just swapped out the shadow and lipstick depending on the scene.