Hugh Hefner certainly doesn't waste any time. Less than two weeks after being dumped by fiancee Crystal Harris, the Playboy founder has moved on with Playmate Anna Sophia Berglund, and he's not holding his feelings back.

"With Crystal gone, Anna is my best girl," Hefner tweeted to a fan who asked if he was dating the Playmate, who was Miss January 2011. He also added that Berglund, 25, is one of Harris' friends, and that "Anna is really one in a million."

However, the almost-Mrs. Hefner doesn't think Berglund and Hef are an item.

"Nope!" Harris tweeted to a fan who asked if Hef was dating Berglund. "Shes just over there regulating making sure Hef ends up w a good girl :)"