What followed was a career on slow decline, failed projects and the hatred of the viewing public.
Here she met future co-star Lauren Conrad, at the time a primary cast member of “Laguna Beach: The Real Orange County”.
In 2006, Montag came to prominence after being cast in the MTV reality television series The Hills, which chronicled the personal and professional lives of Conrad, Montag, and friends Audrina Patridge and Whitney Port.
During its production, she briefly attended the Fashion Institute of Design & Merchandising and was employed by event planning company Bolthouse Productions.
The couple, collectively nicknamed "Speidi", married in April 2009. In January 2010, Montag released her debut studio album Superficial; it was critically panned and commercially unsuccessful, failing to earn back the money she spent making it.
Later that year, they made controversial appearances on the second season of the American version of I'm a Celebrity... She also received widespread criticism after undergoing ten cosmetic surgery procedures in one day.