The Substance actress Demi Moore looked so glamorous in a canary yellow silky gown with floral detailing and killer pink heels at the Chopard Once Upon A Time evening at the Cannes Film Festival at Hotel du Cap-Eden-Roc The Substance actress Demi Moore looked so glamorous in a canary yellow silky gown with floral detailing and killer pink heels at the Chopard Once Upon A Time evening at the Cannes Film Festival at Hotel du Cap-Eden-Roc