Holly's World Holly's World

Holly Madison says she was "really surprised" when she learned her former boyfriend, Hugh Hefner, was engaged.

"There was no gossip about it; no one knew it was going to happen," she tells TVGuide.com of Hef's Christmas Day announcement  that he had proposed to 24-year-old Crystal Harris.

Hugh Hefner proposes to girlfriend on Christmas Eve

So how does Holly feel about it? "I wish them well," she says. "I just hope he's making the right decision and that she takes good care of him."Madison remains focused on the second season of her E! reality series, Holly's World, premiering Sunday at 10:30/9:30c. In the new season, the four-time Playboy cover girl is asked for the first time to shed some pounds. But doing so has been quite a challenge for the former Girls Next Door star."I'm trying to eat healthy, but things have been so busy ... that I really can't find time to work out," she says. "I'm lucky if I get enough sleep every night."

See photos of Holly Madison

In the video below, Madison discusses her producer's weight-loss demand, her Las Vegas Peepshow and her new venture into singing. Check it out: