According to The New Republic and others, we now know who Carly Simon was singing about in “You’re So Vain”. Turns out it was David Geffen, the head of her record label at the time. Apparently Simon “resented the effort he put into promoting rival Joni Mitchell”. As it turns out, Joni Mitchell also wrote a song about David Geffen: A Free Man in Paris.
Here’s the latter:
Smart People I Know 