This isn't really so much fanart as a complete redesign.
Researching material for a recent pop-themed manga, I bought a bunch of teen magazines for fashion reference. I got to thinking how much pop music has changed in presentation in 20 years. Would Jem and the Holograms have even gotten a second glance from the average pop A&R rep these days? What they sang was pop, no argument there, so they couldn't be a riot grrl band (the Misfits, on the other hand...).
So I had a go at redesigning Jem and the Holograms if they had existed today. No dayglo hair anymore, but lots of slick grooming and taut little midriffs. Aja MIGHT look a bit too indie, but she's Asian, so she can be a little more eclectic than the others.