Montana Boyz on Kristin Cavallaris romance with member Mark Estes The Montana Boyz spoke to Fox News Digital at the CMT Music Awards about how Mark Estes relationship with Kristin Cavallari has helped the group. NEW You can now listen to Fox News articles! Spencer Pratt is pulling back the curtain on how he embraced his role as one of reality TV 's most notorious villains.  The 42-year-old became a household name when he starred in the hit reality series "The Hills" from 2006 to 2010. In his