"Skrillex hair"—made famous by the male DJ of the same name, in which a portion of the side of the head is shaved while the rest remains long—is becoming increasingly popular with celebrity women like Cassie, Rihanna, Ke$ha, and Avril Lavigne, among others. It seems like it's shaping up to the be the hairdo of the summer despite the fact that it is totally ugly and it leaves people looking like they're recovering from a brain tumor.

For a minute there, it seemed like Skrillex hair had jumped the shark after it inspired a song, a Tumblr, and a fake Twitter account. No such luck. Laurieann Gibson, Rihanna, and Ke$ha are all doing their part to keep it alive.

Ellie Goulding is actually dating Skrillex the person, which could explain her Skrillex hair. It's unknown what model Alice Dellal's or singer Kelly Price's excuses are.

Cassie, Hazel-E, and Maria Forque.

Jennifer Rovero is a Playboy playmate and Skin Diamond is a porn star and typically, in those professions, when you hear "shaved" you don't think of the scalp. Caroline D'Amore, on the other hand, is a mainstream actress so maybe this is for a role?

It's very possible that Milla Jovovich is shooting Resident Evil 27 and needed to have a portion of her head shaved. Jada Pinkett Smith, though, just seems a lot like Amy Poehler's character in Mean Girls, trying to be cool with her daughter. Avril Lavigne is the latest to sport the look, which actually means that it's probably not even cool with the Hot Topic set anymore.