Ayu's hair in RAINBOW MV.

[waterballoon]

I doubt she rebonds her hair cos once you rebond, it's very difficult & harmful to your hair to curl it back again. Ayu has had curls on her hair lotsa times, so I doubt her hair was bonded... so if at anytime where she has super straight hair, it probably is the work of a flat iron ^^... not like an iron is any healthier but oh well!