Let's compare, shall we: Anne Hathaway  in 2013. Her hair was bleached, her Valentino gown was sheer and plumed with ostrich feathers, and she wore a handful of edgy rings. Flash forward to this year, those brunette locks had returned, an elegant red Calvin Klein dress showed only the most demure hints of skin, and her diamond Vhernier earrings elegantly dust her shoulders. Don't blame Anne, blame Anna (or thank, as the case may be).
With a distinctively contrarian theme  from Punk: Chaos to Couture , we anticipated polar opposite red carpet looks at this year's Costume Institute Gala at the Metropolitan Museum of Art , which paid tribute to Charles James . But in some cases, the side-by-sides go beyond night and day into a whole different century. Anne Hathaway 2014, meet Anne Hathaway 2013. Diane Kruger , say hello to your little punk friend. See all the stars who went from rocking the red carpet to gently promenading down it.
Source: Getty 
Sarah Jessica Parker at the 2013 and 2014 Met Galas
The woman commits to a theme, and for that, we love her.
Anne Hathaway at the 2013 and 2014 Met Galas
This actress is method, and she channeled her inner punk rocker with all the fervor of her Oscar-winning Fantine turn.
Jessica Alba at the 2013 and 2014 Met Galas
Jessica Alba  earns bonus points for her subtle shifts. While both her Tory Burch and DVF gowns featured skin-baring necklines, she swapped black leather for gold lace, a spiked clutch for a metallic minaudiere, and ear cuffs for danglers.
Diane Kruger at the 2013 and 2014 Met Galas
Diane Kruger  is meticulous when it comes to her own red carpet styling, and there is never a strand out of place (though on occasion a few are dip-dyed).
Gisele Bündchen at the 2013 and 2014 Met Galas
What a pro — even Gisele Bündchen's poses are in character.
Kate Bosworth at the 2013 and 2014 Met Galas
Whether Kate Bosworth 's punk or princess, she's always pretty in pink.
Karen Elson at the 2013 and 2014 Met Galas
Transforming from a glam goddess to a fairy-tale princess, Karen Elson is the model attendee.
Taylor Swift at the 2013 and 2014 Met Galas
After a trip to the dark side, Taylor Swift  returned to her sweet self in a charming pastel gown.
Hailee Steinfeld at the 2013 and 2014 Met Galas
Hailee Steinfeld takes a theme literally, and went from punk safety pins to a gala-worthy penguin suit.
Allison Williams at the 2013 and 2014 Met Galas
Something tells us this Oscar de la Renta loyalist felt more herself at this year's gala.
Claire Danes at the 2013 and 2014 Met Galas
While Claire Danes 's modern aesthetic needed little adjustment for last year's theme, she willingly stepped out of the box in Oscar de la Renta to account for the Charles James style.
Karolina Kurkova at the 2013 and 2014 Met Galas
Karolina Kurkova put the theme before her tastes and nailed both red carpets.
Jessica Paré at the 2013 and 2014 Met Galas
We're used to watching Jessica Paré in costume on Mad Men, so seeing her in character these past two years was nothing new to us.
Dree Hemingway at the 2013 and 2014 Met Galas
Meet Dree Hemingway and her evil twin sister (and we mean that in the best way possible!).
Anna Wintour at the 2013 and 2014 Met Galas
Then again, Anna's always Anna .