In show biz, "jumping the shark" is a term used to describe a project in decline. It is derived from the hit sitcom "Happy Days," which, sorely lacking for material after years on the air, featured a show whereby The Fonz went waterskiing in a leather jacket and encountered a shark. You guessed it: The Fonz jumped over the shark on his skis. After that, the days were not so happy on that program.

Now we have Lady Gaga, the ultimate edgy, anti-establishment pop star, swimming in dubious waters. Recently, she fronted a Thanksgiving special. The New York Times described it this way: "Lady Gaga performs before family and friends and offers a glimpse of her personal life in an interview with Katie Couric... She also whips up a feast of deep-fried turkey and waffles with the chef Art Smith."

Somewhere Janis Joplin is weeping. By the way, Gaga's special was trounced in the ratings by the 237th airing of "A Charlie Brown Thanksgiving."

And that's not all. The Associated Press reports that "Gaga's Workshop" is now open at the Barneys clothing store in Manhattan. Apparently, Gaga designed a special holiday shop featuring "a gigantic cartoon statue of the superstar herself in a pinup pose surrounded by jagged mirrors and sitting atop thousands of back plastic discs."

Forget the Rockefeller Center tree, the Gaga shop represents the true holiday spirit, does it not?

Some of you may think I am making this up, but it's all true. What I can't figure out is why Gaga's (Stefani Germanotta) management team seems to know nothing about history. Elvis Presley, the biggest pop icon ever, sabotaged his own career by starring in a series of movies like "Kissin' Cousins" and "Clambake." I mean, there was the once culturally dangerous Elvis doing a dance called the "Clam" on a beach wearing black shoes and white pants. It took the King years to get back on track after those dopey flicks.

Last year, Gaga made $90 million from her songs and shows. Does she really need the Thanksgiving special? Or the Barneys exposure? Really?

The answer, of course, is no. Gaga has now gone middle-class mainstream and, at this rate, will be co-hosting with Kelly Ripa any day now. The lady may be trying not to be a tramp, but she certainly has met the shark -- and jumped it.