I skimmed through two celebrity style books, My Life Outside the Ring by Hulk Hogan and Official Book Club Selection: A Memoir by Kathy Griffin.
If someone puts a gun to your head and tells you that you have to read one, I'd choose the Griffin book. Griffin is very candid about her career, her fellow celebrities and she is painfully honest about her failed marriage. Griffin is an acquired taste and generates a lot of heat for her outspoken views.
Hulk's book offers very little about his wrestling career. Much of the book is his side of his failed marriage and son Nick's legal troubles after a car accident that has paralyzed a family friend. It reads like a deposition at times.