Japanese singer Kumi Koda performs at the Live Earth concert in Chiba, Japan July 7, 2007. Former US. vice president Al Gore and his global partners are staging the Live Earth concerts held on seven continents simultaneously to raise awareness of environmental issues. REUTERS/Michael Caronna (JAPAN) 

Japanese singer Kumi Koda performs at the Live Earth concert in Chiba, Japan July 7, 2007. Former US. vice president Al Gore and his global partners are staging the Live Earth concerts held on seven continents simultaneously to raise awareness of environmental issues. REUTERS/Michael Caronna (JAPAN) 

Japanese singer Kumi Koda performs at the Live Earth concert in Chiba, Japan July 7, 2007. Former US. vice president Al Gore and his global partners are staging the Live Earth concerts held on seven continents simultaneously to raise awareness of environmental issues. REUTERS/Michael Caronna (JAPAN) 

Japanese singer Kumi Koda (R) reacts after winning the "Best Video of the Year" award at the MTV Video Music Awards Japan 2007 in Saitama, north of Tokyo, May 26, 2007. REUTERS/Kiyoshi Ota (JAPAN) 

Japanese singer Kumi Koda poses for photographers upon her arrival at the MTV Video Music Awards Japan 2007 in Saitama, north of Tokyo, May 26, 2007. REUTERS/Kiyoshi Ota (JAPAN) 

Japanese singer Kumi Koda reacts as she receives a necklace at the best jewellery wearer award ceremony during the 18th International Jewellery Tokyo 2007 fair in Tokyo January 24, 2007. Japan's largest jewellery trade fair goes on till Saturday. REUTERS/Kim Kyung-Hoon (JAPAN) 

Japanese singer Kumi Koda reacts as she receives a necklace at the best jewellery wearer award ceremony during the 18th International Jewellery Tokyo 2007 fair in Tokyo January 24, 2007. Japan's largest jewellery trade fair goes on till Saturday. REUTERS/Kim Kyung-Hoon (JAPAN) 

Japanese singer Kumi Koda reacts as she receives a necklace at the best jewellery wearer award ceremony during the 18th International Jewellery Tokyo 2007 fair in Tokyo January 24, 2007. Japan's largest jewellery trade fair goes on till Saturday. REUTERS/Kim Kyung-Hoon (JAPAN)