Sometimes we stumble across something that just gets us. Sometimes it's a movie, sometimes a fortune cookie, other times a song. Katy Perry
just gets french singer Yelle's song, "Compltement fou" which translates to "stark, raving mad" (shout out to google translate for that slice of knowledge), and as her tweet proves booty bouncing is a universal language.
Since I don't speak french either I can only guess from the video that Yelle likes corn, popcorn, bright colors, glitter, and techtonik dancing (which requires a lot more bouncing than just your butt). Even if Katy and I don't have the slightest clue what she's saying you just gotta respect your booty when it wants to let loose! So go "Compltement fou" and let your fou flag fly!