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As Celine Dion celebrated the 20th anniversary of her hit "My Heart Will Go On" in a white gown with mega statement shoulders at the Billboard Music Awards, Rita Ora also brought back the ’80s trend — the sartorial battle between these two music divas is too real. Nicole Kidman and Elisabeth Moss on the red carpet in Cannes also go head-to-head, while Hailee Steinfeld and Lea Michele choose the same barely there designer for the same event. Yahoo Style's Joe Zee rounds up his favorite looks of the week and pits them head-to-head to see who will emerge as the winner in this week's edition of Knockout Style.