DOWNLOADShe's so girlish in the beginning
About this video... is there one for each member?
http://picroda.jphip.com/akb48/jphip06380.gif
After some careful (frame-by-frame) observation, it's not. I believe she's wearing black athletic shorts, or something. They could be boy shorts, but I don't think she's the type to wear those (despite the name).