Model Christie Brinkley will always look back on her divorce from musician Billy Joel as her easiest relationship split. Four-times married Brinkley and Joel ended their nine year marriage in 1994 after a daughter, jazz star Alexa Ray Joel, together. Brinkley, who is currently in the middle of a bitter divorce from her fourth husband Peter Cook, says, "Billy and I are friends. "I think we had the quickest, shortest, fastest, most amicable showbiz divorce - that's what my lawyer told me anyway."