By JONATHAN HICAP, Manila, Bulletin   MANILA, Philippines - Nine-member K-pop group Girls Generation achieved another milestone in Japan with their single "Mr. Taxi" reached double platinum status in Japan.       (Clockwise from top left) Girls Generation, Kim Hyun Joong,  T-ara  and Bae Yong Joon. (Photos by SM Entertainment, Oricon, www.newsen.com and Keyeast)