Carly Simon Carly Simon

It only took 44 years, but Carly Simon has finally fessed up about the identity of the man that prompted her to write "You're So Vain." Well, sort of.

The hit song, which includes the now-famous chorus, "You're so vain, you probably think this song is about you," has been the topic of much speculation over the decades, as fans, journalists and celebrities have offered up guesses as to who might be Simon's ex-boo. Mick Jagger, David Geffen, her ex-husband James Taylor and Cat Stevens were among the most notable names rumored to be the cad in question.

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Simon made a bit of a game in keeping the truth a secret - she auctioned off the answer for $50,000 to benefit a charity under the condition it remain on the down low back in 2003 -- but now she has spilled the beans to People. You ready?

The song is about Warren Beatty. Part of it, anyway.

"I have confirmed that the second verse is Warren," she said. Beatty, for his part, has long thought that the entire song was about him, a theory Simon shot down. "Warren thinks the whole thing is about him!" she said. The other two verses are about two other men, she said, and she may not ever reveal who those guys are.

Jeez! This thing is getting more elaborate than The X-Files, right?