Carly Simon’s 'You're So Vain' is one of the most famous 'diss tracks' in pop history, though its target remained a mystery for over 40 years. The song’s lyrics describe a narcissistic man, leading fans to speculate it was about famous figures like Mick Jagger (who sang backing vocals on the track), Warren Beatty, or James Taylor. In 2015, Simon finally confirmed that the second verse was indeed about Warren Beatty, but she maintained that the other verses refer to two other men who have yet to be named. The song reached number one on the Billboard Hot 100 and became Simon's signature hit. In 2003, she auctioned off the secret of the song's subject at a charity event for $50,000, with the winner being sworn to secrecy. The song's blend of folk-rock and sharp storytelling remains a benchmark for singer-songwriters.