Kristin Cavallari went back to the beach and proceeded to get hit with a tidal wave of Instagram comments after sharing an image with her ex.On Tuesday, the reality TV star posted an image that showed her cuddling up to Stephen Colletti, her ex-boyfriend from "Laguna Beach.""2004 or 2020?!," she captioned the grainy image. 2004 or 2020?!A post shared by Kristin Cavallari (@kristincavallari) on Kristin and Stephen famously dated on "Laguna Beach," MTV's super-popular reality TV show that aired