We were really disappointed to learn that Heidi Fleiss has backed out of appearing on Celebrity Rehab - and at the last minute. She would have been fun to watch. Rod Stewart's problematic son Sean Stewart signed up for the treatment - we're betting daddy cut him off and he needs money. And weepy, whiney, Jeff Conaway is COMING BACK. He seems doomed to repeat all his mistakes. Another interesting patient will be Rodney King, the lovely man whose arrest started the 1992 racial riots in LA. Sexy video vixen Tawny Kitaen is best known for being arrested for battering her exhusband Chuck Finley with her high heel boots. To top it off, crazy, born again Gary Busey will be a drug counselor! (We KNOW he needs the money) Can you IMAGINE taking advice from Gary? Dr Drew Pinsky (shown above with last year's grads) is in for a WILD RIDE. The show will air in October.

We couldn't help but wonder why Rod Stewart's son Sean was NOT present when Rod married Penny Lancaster last weekend at that 17th century villa on the Italian Riviera. After all, Sean's sister Kimberly was there. We found out that bad-boy Sean was NOT invited. Rod was not happy about Sean's latest brick throwing dust-up and resulting lawsuit. He wouldn't even buy Sean a COACH ticket. But insiders say Rod spoils his "little princess" Kim. Kimberly can do no wrong in her daddy's eyes and he gives her anything she wants.

Photo Credit: Buzz Foto

Well, well, look who's out nightclubbing already! It's Ashley Hamilton, who swore he was giving up nightclubs for AA meetings. His vow didn't last long - he must have the same rehab convictions as Lindsay Lohan and Robbie Williams. On this night he was roughhousing with his half-brother Sean Stewart , another rehab graduate, as they left Hyde. Oddly enough, Alana Hamilton Stewart, their mother, was out clubbing with them.

Kristin Cavallari's latest boyfriend, hockey player Mike Comrie, might not be thrilled to hear that she's not exactly sitting at home waiting for his call. Kristin split from Brody Jenner at the end of summer and started dating Mikea few weeks ago. Comrie plays for the Phoenix Coyotes and he spends a lot of time on the road. What's a girl to do? Kristin was seen at Hyde cuddling up to Sean Stewart ( he's Rod Stewart's kid.) Either the mouse is playing while the cat's away, or Kristin has decided it's just not fun to be a hockey widow.