Born and raised in Crested Butte, Colorado, United States of America, she befriended Lauren Conrad in 2005. Later that year, they made controversial appearances on the second season of the American version of I'm a Celebrity. Post navigation. Heidi Blair Pratt Montag is a 31-year-old American TV host, singer, designer. All content which is displayed on this website was created by users and community only mongag purely learning and entertainment purposes. As the series progressed, Montag began dating fellow cast member Spencer Pratt, which ultimately ended her friendship with Conrad.