There are reality TV faces, and then there are reality TV stars. Kristin Cavallari fell into the latter category, after her sizzling breakout role on MTV’s reality teen soap “Laguna Beach: The Real Orange County” (2004-05). After appearing on the first two seasons of the hit series, Cavallari transformed herself into a Hollywood “It girl,” showing up at star-studded events and award shows. Despite having a limited resume at best, she also became an overnight tabloid sensation, with her dating and social life – particularly her alleged relationship with a newly single Nick Lachey – suddenly