Warren Beatty “You’re so vain,” sang Carly Simon, “you probably think this song is about you.” A lot of smart money has it that the song is about movie legend Warren Beatty, Simon’s ex lover. Simon has never officially revealed the subject of her barbed musings, but Beatty really does think it’s about him. “Let's be honest,” the star claimed in 2007. “That song is about me.” Beatty’s vanity appears to have worked. It’s claimed he has slept with 12,775 women.