4/18/2009 in Spencer Pratt wants to see who can add more followers on Twitter in 30 days. Karla Casillas Spencer Pratt is apparently trying to catch the media hype that came from the Ashton Kutcher/CNN Twitter challenge. *Us* magazine is reporting that the *Hills* star has challenged Kutcher to see who can add the most followers in 30 days. "From the moment Ashton accepts my challenge, assuming he's man enough to do so, whoever adds the most new followers in 30 days wins," Pratt said. What does the winner get? If Pratt wins, he said Kutcher and Demi Moore have to wash his car. If he loses, then "Heidi and I will clean their house," Pratt said.