Kylie Jenner shared photos of herself in a blue Roberto Cavalli one-piece swimsuit on Instagram amid her family vacation.

We can't formally confirm Tinx's theory (unless, of course, Kenny or the brand wants to chime in here), but we have to admit ...

Kylie Jenner hit the beach in a $5,500 vintage Chanel bikini that was previously wore on the runway by Claudia Schiffer.