madonna
IN PHOTO: Pop icon Madonna confirms return to Australia on August 2016, nearly a quarter of a century since her last visit, as part of her "Rebel Heart" world tour, Billboard reports. Madonna performs her song "Open Your Heart" during the Macklemore and Ryan Lewis' "Same Love" performance at the 56th annual Grammy Awards in Los Angeles, California January 26, 2014. Reuters/Mario Anzuoni

A new book has claimed that Madonna had an affair with John F. Kennedy Jr. Christopher Anderson has revealed in his book "The Good Son: JFK Jr. and the Mother He Loved" the shocking secret of Kennedy Jr's affair with the pop icon while she was still married to Sean Penn.

The author has summarized Kennedy Jr's life, from his childhood to his youth, while giving a detailed description of his controversial relationships. Kennedy's mother, Jacqueline Kennedy Onassis, reportedly did not approve of Madonna. According to the book, Jacqueline did not like the fact that Madonna was being compared to Marilyn Monroe.

Moreover, Anderson has also revealed a private phone message, which Madonna left for John: "Kennedy (she often called him that), I'm drunk and when I see you next I'm going to take your ....." claims the book. Kennedy allegedly played this message to his friend Billy Noonan, who was shocked to know about former's affair with Madonna.

John and Madonna reportedly met at a party following one of her concerts at Madison Square Garden in 1985. The pop icon supposedly told her friends that her affair with John is going to be "cosmic." "Madonna was convinced that destiny was taking a hand in bringing together the undisputed heiress to Monroe's platinum persona with the son of JFK," reads the statement from the book's excerpt as published by New York Daily News.

Meanwhile, the book also talks about John's affair with Sarah Jessica Parker. The two had an affair for a brief period but it was nothing less than steamy, as exposed by the book. Kennedy later married Carolyn Bessette-Kennedy.

Christopher Andersen is a well known American journalist and has previously written two more books on John F. Kennedy's family history He has also authored the New York Times' bestseller "These Few Precious Days: The Final Year of Jack with Jackie." Just like "The Good Son," "These Few Precious Days," gave a controversial account of the 35th U.S. president and his wife Jacqueline. Anderson has also written a standalone book on Jacqueline Kennedy's life titled, "Jackie After Jack: Portrait of the Lady."