Jessica Simpson Doesn't Think Ex John Mayer Will Be "Shocked" By Her Memoir

Ashlee Simpson is celebrating her sister! Following news that Jessica Simpson's memoir, , hit number one on the  Best Seller List in the nonfiction category, Ashlee took to Instagram to praise her older sister's accomplishment.

Learning from her mistakes. Jessica Simpson recounted the trials and tribulations of her relationship with John Mayer and how it affected her self-esteem during her appearance on The View on Wednesday, February 5.

Former footballer Tony Romo called it quits with Jessica Simpson because he couldn’t believe she wasn’t seeing ex John Mayer behind his back.

Jessica Simpson stepped out of her hotel in New York City wearing an eye-catching pink ensemble. The look included a PVC coat with fur trim by Saks Potts.

Jessica Simpson is sharing deeply personal stories with her fans.

Jessica Simpson gives a whole new meaning to being an “open book” in her new memoir, Open Book, which released today, February 4. In a bombshell confession, the fashion designer, 39, reveals for the first time that Tony Romo ended their two-year relationship in 2009 after he thought Jessica cheated on him with her ex at the time, John Mayer.

Jessica Simpson is speaking out like never before.

Jessica Simpson didn’t hold back while writing about ex-husband Nick Lachey in her new memoir, Open Book, but he certainly wasn’t the only ex she put on blast.

The singer, fashion designer and now an author, Jessica Simpson spoke in depth about her tumultuous relationship with John Mayer. The sultry diva, who wrote her memoir, called 'Open Book' says that her relationship with John was very complex, and she got back together with him almost close to 9 times.

A moment of reflection. Jessica Simpson opened up about both the good and bad aspects of her relationship with ex-boyfriend John Mayer.

It seems gravity kept pulling John Mayer and Jessica Simpson back together. 

Jessica Simpson is opening up about her tumultuous relationship with John Mayer.

Jessica Simpson has a new memoir coming out called Open Book, and it's already given us some juicy details about her past relationships.

Juicy flings, rumored beaus and serious boyfriends! See which guys were lucky enough to date Jessica Simpson through the years — including ex-husband Nick Lachey, John Mayer, Tony Romo and current husband Eric Johnson.

Jessica Simpson is baring it all in her upcoming memoir, "Open Book."

Jessica Simpson is baring it all in her upcoming memoir, "Open Book."

John Mayer made headlines in 2010 for a lewd comment he made about his then ex, Jessica Simpson, in which he referred to her as “sexual napalm.” Back then, John discussed their “crazy” sex life in an interview with Playboy, and admitted that Jessica was like a “drug” to him, “like crack cocaine.” Now, in her new memoir, Open Book, out on February 4, Jessica recalls feeling “embarrassed” and “shocked” by John’s “sexual napalm” comment — something Wendy Williams found no fault with.

Remember when Jessica Simpson and John Mayer were dating? Yeah me either, but it happened—and now Jessica is spilling piping hot tea all over the place. In her upcoming memoir, , the singer opens up about her relationship with John, who she met at a 2005 Grammys party. Apparently, our dude told Jessica he was big into her song "With You" and started writing her notes. Before long, they were dating—and it was, uh, a lot.