Who is the fairest music mogul of them all?

So, how do you calculate “the top 12 most powerful musicians of today”? Well, according to MuchMusic.com, it’s a careful scientific formula based on album sales, clothing lines, fragrances, sold-out tours, charities, endorsement deals, and relevancy—whatever that means.

And based on their calculations, New Rochelle native P. Diddy — labeled “The Unstoppable Entrepreneur” — came in right at No. 4, thanks in large part to his extra currics: “Making the Band,” his Broadway shows, and Bad Boy Records.

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But soon enough, he won’t be Westchester’s lone representative on the list. If the rumor that Beyonce and Jay-Z are moving to Scarsdale comes true, we’ll have Nos. 7 and 2, respectively, in the hood, too.

Course, if we were ranking not just musicians but all-around music moguls, I’d be mobilizing to make the case for part-time Pound Ridger Clive Davis — the record producer behind everyone from Whitney Houston to the American Idol winners. No disrespect to Diddy, B, or Z, but when it comes to music biz heavy hitters, Clive trumps all.

“The Top 12 Most Powerful Musicians of Today” [MuchMusic.com]

(AP Photos — Beyonce: Evan Agostini; Diddy: Chris Pizzello; Jay-Z: Henny Ray Abrams)