Well, you can always use Mariah from Wognified in some way.
And even though I haven't made a comic page of her in concert, she's technically a super idol (which you'll see her frequently in her normal concert clothes in a future series), so if you want to put her on a stage performing or make a flyer in a background advertising a concert, here's the concept art of her concert clothes, which also hide her ribbon arms and show off her futuristic electric guitar (I figure both our comic worlds have fancy advanced technology, so why not. : P).
Also, despite the chibi style making her appear younger, she's 21.
