*Putting the weight back on (Kelly LeBrock, "Brady Bunch's" Maureen McCormick);

*Graduating to drug rehab (Baldwin, Jeff Conaway), and

*Dating drill sergeant Harvey Walden ("American Idol's" Kimberly Locke).

Do I still watch "Celebrity Fit Club"? Yes I do, in much the same way I still get sucked into those magazine articles. I can't say it's helped me lose weight, but I have learned about the following trends:

Trend one: The demand for D list celebrities is increasing.

We have created these "stars," who hail from the world of reality TV, '80s sitcoms and disposable pop music. What are they supposed to do now? They can't crawl back under the sidewalk. They need to make some kind of living, and "The Love Boat" hasn't needed guest stars for decades.

If these used-to-be's aren't lucky enough to host a reality show, they have to be on one. Do you think if they had any other career options - ANY - they would be on "Celebrity Fit Club"?

This season, the cast includes:

Bobby Brown, veteran of "VH1 Where Are They Now?," "Being Bobby Brown," and jail.

Tanisha Thomas, the breakout star of season two of "Bad Girls Club" (not a claim I can personally verify, but she's insistent about it).

Sebastian Bach, the former frontman of Skid Row, who made it to Broadway with 2000's "Jekyll & Hyde."

Kaycee Stroh, the "High School Musical" regular without a nose job or nude photos online.

Jay McCarroll, who won the first season of "Project Runway" by accessorizing with oversized headphones.

Trend two: Contestants are getting thinner.

This season we'll also be watching Nicole Eggert try to get back in shape. Eggert, God bless her, is just 130 pounds - but for a "Baywatch" alum, that's considered morbidly obese.

It's a little startling, now that "The Biggest Loser" boasts a contestant with a 526-pound starting weight (Chicago's very own Michael Ventrella). But Hollywood is a parallel universe. And, notes Eggert of the rigorous boot-camp schedule, "Harvey's got nothing on my mom."

This trend contains a fairly disturbing mini-trend: The show seems to attract a disproportionate number of Scott Baio exes. Erin "Joanie" Moran, Erika Eleniak of "Baywatch," and now Eggert - who played one of Baio's charges in 1987's "Charles in Charge."

Let's be grateful that he is officially out of the dating pool.

Trend three: You haven't hit bottom until you've been on a reality show with your ex.

Also on board this season: Kevin Federline, Britney Spears's ex, who says, "I look like a pregnant man right now."

And? Shar Jackson, who played Brandy's BFF on "Moesha." She was also, you'll recall, pregnant for a second time with Federline's baby when he took up with Spears.

Each says they didn't know the other would be on the show. We know that it has the potential to be riveting TV - at least for those of us also watching exes Tom Sizemore and Heidi Fleiss reunited on "Celebrity Rehab ... With Dr. Drew." In teasers for the show, Fleiss hisses at Sizemore, "You're such a loser ... The thought of being with you turns women gay."

Jackson is infinitely more sympathetic. When the Federline-Spears news broke, she became synonymous with "pregnant and dumped."

"I didn't even do anything, and yet it ate my life," she says on "Celebrity Fit Club." "I read somewhere that I was Kevin and Britney's nanny."

And now - irony alert! - she lands a paying gig to help turn her life around ... only to find that Federline is along for the ride.

Her anguish is surprisingly poignant, and you feel for Federline, too, who clearly has been struggling with depression.

I'm not sure where this last trend will take us, but I do have some advice for Scott Baio: For all our sakes, watch your weight.