Carly Simon has finally revealed the subject of her most famous song, after years of speculation and rumour.

It was widely believed that 'You're So Vain' was about actor Warren Beatty, who the singer dated in the early 1970s - but other names in the frame have been Mick Jagger, her ex-husband James Taylor, David Bowie, producer David Geffen and even Cat Stevens.

Now Simon has told People magazine that the 1972 song is indeed about Beatty - but only partially. More specifically, the second verse:

"Well, you had me several years ago
When I was still quite naive
When you said that we made such a pretty pair
And that you would never leave
But you gave away the things you loved
And one of them was me
I had some dreams, they were clouds in my coffee
Clouds in my coffee, and…"

"Warren thinks the whole thing is about him," she said - but wouldn't that perfectly prove a point?!

As for who may have inspired the other verses, she is keeping schtum. "I don't think so," she said of revealing names, "at least until they know it's about them."