Photo-Illustration: Vulture; Photos: Getty Images (Emma McIntyre, Simone Joyner, Scott Taetsch), Everett Collection (Vestron Pictures, Warner Bros., 20th Century Fox, Netflix), Courtesy of retailers Kristin Cavallari was just a kid when she became famous. Cast on MTV’s Laguna Beach as a high school junior, Cavallari quickly rose to early ‘00s fame thanks in part to an on-screen love triangle that she and the rest of the show’s cast now say was mostly manufactured. When Laguna Beach ended, she