They are her harajuku girls. Seriously, it's my understanding she is keeping them somewhat mysterious and only refers to them as her "inspiration."
The Urban Dictionary A girl that is willing to be treated like a doormat or booty call. She is a girl that will allow guys to do whatever they want with her and will just wait for them to 'holla back' at them. Jermaine fools around with Aisha. Thinking he likes her, she waits around for him to make contact with her again. or Gwen Stefani's use: A person who verbally postures (hollers back) in an argument and does not step up and fight. Gwen says she is not a holla back girl, implying that she will fight if challenged. There's a few more definitions for it on the link above
Haha! Good stuff. I've noticed a very disturbing trend while going out the last few times. Every time that "Holla Back Girl" song comes on, there's always a few asshats who are up on the dance floor getting down to it all by themselves. Now, I fully support going out on the floor and doing your thing. But when a girly ass song like that comes on, get off. You look like a damn fool throwing your hands up and singing along to it..
We have a girl in our office who does this while walking down the hallway, singing the song to herself.