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Sandra Bullock, Ben Affleck, Snooki and more of the most improved celebs of 2013

By Jessica Wedemeyer Slide 1 of 13

September is Self-Improvement Month, and in honor of the occasion, we're rounding up the most improved stars of 2013. Keep reading to see how Ben Affleck, Sandra Bullock, Selena Gomez and more celebs bettered themselves this year.RELATED:Hollywood's single momsSandra BullockHello, Sandy! Where have you been hiding? The Oscar winner is finally out of hiding following ex-husband Jesse James' 2010 cheating scandal -- and she's back with a bang! After two years of mostly shirking the red carpet -- and donning mostly black or neutral ensembles for those rare public appearances -- Sandy stepped out in a major way in 2013. While promoting her films "The Heat" and "Gravity," the A-list actress debuted her better-than-ever body and new appreciation for bright colors and sexy silhouettes. We likey!
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