In a tell all book about Simon, the singer admits to her husband that she did sleep with Mick Jagger.
Carly Simon always denied the fact that she did anything physical with Mick.
But in More Room in a Broken Heart: The True Adventures of Carly Simon, Simon admits to hubby James Taylor that she and Mick had been lovers.
The book also says she tried to take it back but Taylor never believed her.
She later found John Travolta.
The book, written by Stephen Davis, will release in January.
We wonder what other secrets of Simon's might be revealed.
[Image via WENN.]