Carly Simon: 'You're So Vain' Subject Still a Mystery Singer laughs off reports that enigmatic song is about David Geffen By M. Morris, Newser Staff Posted Feb 28, 2010 3:10 PM CST 12 comments Comments Carly Simon is photographed in New York on April 24, 2008. (AP Photo/Jim Cooper) (Newser) – Return "subject of 'You're So Vain'" to your "unsolved mysteries" file—Carly Simon says that contrary to widespread reports last week, the song isn't about producer David Geffen. "What a riot! Nothing to do with David Geffen!" the singer-songwriter tells the Hollywood Reporter. "What a funny mistake! Someone got a clue mistaken for another mistake!"