It can be a song performed by the member or produced by the member, your choice. It cannot be an X Japan song though!
Yoshiki - Amethyst / I'll Be Your Love (Produced by Yoshiki)
Toshi - Asphalt Jungle / Paradise
Pata - Fly Away / Positively Unsure / GLOW (Dope HEADz)
Taiji - Break Down (Kings) / Dear Friend
hide - Pose / Doubt / Beauty & Stupid
Heath - GLOW (Dope HEADz) / Crack Yourself