I'm wracking my brains....the most reasonable theory I've yet seen on who is the subject of "You're so vain" holds that it's written about Carly's pet dog . Guys wouldn't wear apricot scarves, for goodness sake, but putting a scarf on your dog was common back in the early 1970's. I read a writeup about this theory several years back that made each individual lyric seem plausible to the dog theory. The icing on the cake, however, is how everyone began theorizing how it referred to one of her previous boyfriends. Does anyone have a link to an article raising this theory?