Reese changed her diet and it shows! The skinny superstar is getting ready for the Oscars by eating right and running a lot. We know black is slimming, but the girl is seriously trim. Since she is last year's Best Actress winner, she'll be presenting this year's Best Actor award on Sunday night. We're gearing up for the Oscars in our own way so make sure to check out the site this weekend and prepare to watch and hang out online with us and of course, don't forget to fill out your Oscar ballot! The Grand Prize winner will receive a Prada bag while runners-up will get $50 to $500 gift cards from Neiman Marcus, Sephora and The Apple Store. Good luck and for official rules click here. Fun times!