**EXCLUSIVE** Heidi Montag and Spencer Pratt mark the end of their engagement by partying in Las Vegas

January 05, 2008

LAS VEGAS, NEVADA - Saturday January 5 2008. **EXCLUSIVE** Heidi Montag and Spencer Pratt prove they are still very much together as they hit the dance floor at Las Vegas's Jet nightclub. The couple, who shot to fame on the US reality show "The Hills", travelled to Sin City for a party to mark the end of their engagement, but not the end of their relationship.