Do those girls realize their butts are hanging out? And then, as if the fashion gods sent a memo to women from their teens to their 20s, butt cheeks were not just the occasional sight; they seem to have replaced Ugg boots as the must-have fashion item for a particular type of California girl. During spring break this year, after the rain gave way to sunshine, girls broke out the booty shorts by the kajillions. Personally, I have never attended the Coachella music festival, but from the photos I've seen, it appears to represent the apotheosis of the exposed-glutes trend. A more descriptive name might be "Buttcheek-a-palooza.