Wondering what HEIDI KLUM will wear to the Oscars?

Tonight, ET is with the supermodel and host/producer of "Project Runway" as she is fitted for her couture dress, which was made exclusively for her by JOHN GALLIANO. Watch as Heidi also gets a hair and make-up consultation from Victoria's Secret!

If you like what you see, you can win Heidi's gown and wear it to a soiree of your own! Mom of three Heidi is attending the Oscars on behalf of Diet Coke as part of the Red Dress Campaign to benefit Heart Truth. Her dress will be given away on www.mycokerewards.com -- the proceeds will go towards women's heart disease research and awareness.