Insider: New Vegas star Holly Madison received a special guest after her topless show last month. Hugh Hefner and his bevy of beauties came to town to let loose and take in some shows. Hef made a point of checking out his former girlfriend's performance in "Peepshow" at Planet Hollywood Resort & Casino.

Hef and three of his girlfriends, Crystal Harris, Melissa Taylor and Anna Berglund, settled in to the VIP seats to watch the show, although there were a few surprises in store for Hef. Madison made it so that Hefner could be pulled on stage for "Trick or Two," a steamy number that often calls for audience participation.

Hef and his girls made it backstage to congratulate Holly, who changed into a black silky mini wrap to entertain Hef and his entourage. Harris, Taylor and Berglund painted fluffy sheep on the walls in honor of Madison's "innocent" character Bo Peep. Hef joined in with a sheep drawing of his own, complete with his signature pipe.

"I was delighted, it was wonderful. I really enjoyed it, I think everyone did, it was really enjoyable!" Hefner said. "Holly makes a fantastic Bo Peep."

For LxM Kimberly McGee