It's always nice to enter the New Year a little lighter. For some it's ditching a bad habit or all those knickknacks cluttering up the house. But for this group of female celebs that includes the likes of Pink, Hilary Duff, and Miley Cyrus, it's a bit more literal. Each one of these stars has dropped at least 20 pounds over the course of the year. Keep reading to see amazing before and after pics of six stars that dropped major weight and learn just how they hit their goal.