Poll: Which "David" was Carly Simon singing about in "You're So Vain?"

Carly Simon is dropping clues about her most famous song. (AP Photo/Jim Cooper)

It's a rock-n-roll riddle that's irked music fans for 38 years: Who's the subject of Carly Simon's career-defining hit "You're So Vain?"

Various sources reported a new clue on Friday. According to the Times of London, in a recently re-recorded version the 1972 single, Simon whispers the name “David” backwards, about halfway through the song.

According to reports, Simon recently told Uncut Magazine, “The answer is on the new version of 'You’re So Vain.' There’s a little whisper — and it’s the answer to the puzzle."

Not quite. While former front-runners Warren Beatty, James Taylor and Mick Jagger are now out of the picture, there are plenty of potential Davids out there.

Who do you think Carly Simon was singing about? Cast your vote below.