Riyo Mori born December 24 , 1986 in Aoi-ku , Shizuoka , Japan is a Japanese dance instructor who won the Miss Universe 2007 title in May 2007 . Riyo Mori ( born December 24 , 1986 in Aoi-ku , Shizuoka , Japan ) is a Japanese dance instructor and model who won the Miss Universe 2007 title in May 2007 .