A few months ago in this space, I wrote a column about the cultural phenom Lady Gaga that ended with my politely telling her to save her money. That’s because the treacherous world of popular culture is not usually a long-term proposition. Entertainment idols often pass through the fame obstacle course very quickly.

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.