who sang the song you're so vain
âYouâre So Vain,â Carly Simon finally reveals who! Posted by Brandon Kim on November 6th. Sort of. One of the greatest mysteryâs in American music has been the identity of the man in the hit song âYouâre So Vainâ since itâs debut in 1972. Who is Carly singing about? People have speculated on which celebrity ex-boyfriend it is for decades.