If one of my friends is going to be Angus Young or Axl Rose for Halloween, what should I be?

I'm a girl and my friend Josh (who I mentioned in a different question) is going to be Angus or Axl, and we wanna do something together, so I have no clue what to do for that. I have to match his costume, but I can't think of anything or anyone to be Any ideas?
Update: is there a girl character besides a groupie?
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