Kristin Cavallari met Mark Estes through social media
Kristin Cavallari has described Mark Estes as the "hottest guy" she's ever seen.
Kristin Cavallari wasn't "searching" for a younger man when she met her 24-year-old boyfriendKristin Cavallari has defended the 13-year age gap between herself and her new boyfriend, Mark Estes.