Perhaps no celebrity's emotional roller coaster through life has been put on display more than that of singer Britney Spears. After various odd behaviors this year, many speculated that the singer was suffering from postpartum depression after giving birth to two sons, Jayden and Sean, as well as bipolar disorder. Finally, the singer has spoken about her public breakdown, saying, "There's no excitement, there's no passion. I have really good days, and then I have bad days. Even when you go to jail you know there's the time when you're going to get out. But in this situation, it's never ending. It's just like 'Groundhog Day' every day."
(Kevin Winter/Getty Images)