Shiratori Hasumi

 is a former member of X21.

Albums

 * Shoujo X
 * Beautiful X

Singles

 * Ashita e no Sotsugyou
 * Koi suru Natsu!
 * Happy Appli
 * X Gift
 * YOU-kI no Parade
 * Magical☆Kiss
 * Yakusoku no Oka
 * Natsu dayo!!
 * Kagami no Naka no Parallel Girl
 * Genjitsu kara Nigeru kara Genjitsu ga Tsurainda
 * Friday Night Party
 * Destiny