Bear with me here, I know I have a boy....
I've got a pack of 9-12 (I think) sleepsuits - they're pretty unisex imo, and are white with thick grey stripes with skulls on, and guitars (I think) and I think one says "born to be a rocker"...
I'll try and get a picture later. They've never been worn, and as much as I think they are really really cool, we just don't do sleepsuits anymore he's a PJ's boy.
If you think they're girly enough I'll happily send them over to midna island for you x