Michelle Williams grabbed her Louis Vuitton Speedy bag and car keys and headed into a boutique in West Hollywood over the weekend. The actress is on the West Coast prepping for this Sunday's Oscars ceremony — have you filled out Buzz's ballot and entered for a chance to win a big screen TV? She's nominated in the best actress category for her role in Blue Valentine, but she's facing fierce competition from Black Swan's Natalie Portman, who may be the next to sweep award season. Michelle chose a floor-length Valentino for this year's Golden Globes ceremony, but for her stunning entrance at the 2006 Academy Awards she choose an iconic yellow Vera Wang gown accessorized with an art deco necklace. Whatever she decides to wear, we'll be covering it live Sunday night from the red carpet — follow us on Twitter for exclusive news and photos!