Jason Nevader, WireImage; AP File Photo
Kelly Clarkson in 2003 and 2011
Well, you win some, you lose some - at least when it comes to weight, that's for sure.
While some stars like Jennifer Hudson, Nicole Richie and Jonah Hill have lost an amazing amount of weight, other celebrities like Christina Aguilera, Mariah Carey and Tyra Banks have gained some pounds instead.
We look at how some celebrity bodies have changed over the years in the gallery below.
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