I know what you're thinking. What's Coachella?
Coachella appears to be some sort of music festival. It was held on April 15, 16, 17 this year.
You are probably familiar with some of the bands performing at this festival.
This article explained the rest. You should absolutely read it. Because it is fucking crazy. No seriously, the article uses the term "milk sacs" as a stand in for "breasts".