Stars Celebrate Halloween in Costume!: 
Halloween isn't officially until next Wednesday, but stars started celebrating early with parties in LA last night. Alessandra Ambrosio and her fiancé dressed up for a Beverly Hills bash as did Hilary Duff and her husband, Mike Comrie. Emma Roberts channeled her aunt Julia as Pretty Woman while Ryan Seacrest and Julianne Hough went as Bonnie and Clyde. There were even more celebrities in costume so click through to see them all as they got a head start on the spooky holiday!
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Halloween isn't officially until next Wednesday, but stars started celebrating early with parties in LA last night. Alessandra Ambrosio and her fiancé dressed up for a Beverly Hills bash as did Hilary Duff and her husband, Mike Comrie. Emma Roberts channeled her aunt Julia as Pretty Woman while Ryan Seacrest and Julianne Hough went as Bonnie and Clyde. There were even more celebrities in costume so click through to see them all as they got a head start on the spooky holiday!
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