Christie Brinkley once thought Billy Joel was her soulmate. But in her new book, Uptown Girl, the 71-year-old model reveals how his battles with alcohol ultimately shattered that dream—and their marriage.

The model “never wanted” to end things with the ‘Uptown Girl’ singer, but in the end had to make the decision to leave.

Christie Brinkley opened up about the breaking point moment that led to her breakup and divorce from ex-husband Billy Joel ahead of the release of her memoir 'Uptown Girl' on April 29. Here's when she knew she "couldn't live" with Joel any longer.