Pravana, a maker of vivid hair dyes, recently coined the term "sand art hair" to describe this Technicolor look. Friedman doesn't use the phrase herself, but she says this style is in demand—and more involved than you may expect. "First, you have to pre-lighten the hair, and that can be very time-consuming," she says. "As for the maintenance, because it's so many different colors, you can't touch up each color." The intense color will last from three to six weeks, she says, so be sure to get those Instagram snaps in before the color fades.