Audemars Piguet
In 2006, Irwin's Irridescence, which had been named Champion Filly at 3 in South Africa the year before when she was a double Grade 1 winner, upset two-time Breeders' Cup heroine Ouija Board (horse) in the Grade 1 $1.8-million Audemars Piguet Queen Elizabeth II Cup in Hong Kong.