The Hills 'Hills' star Spencer Pratt issues new Ashton Kutcher Twitter challenge 04/18/2009 Spencer Pratt of the U.S. reality TV series "The Hills" says he wants to compete against actor Ashton Kutcher in a Twitter popularity duel. Read More RELATED NEWS Kristin Cavallari debuts new 24-year-old boyfriend Mark EstesBrody Jenner and Tia Blanco welcome their first child'The Hills' alum Brody Jenner engaged to pregnant girlfriend Tiarah "Tia" Blanco TAGS: Heidi Montag Ashton Kutcher Just Married The Butterfly Effect
