I find this article from June to be on-topic:
Newsarama.com : The Supergirl Shorts Story: Talking to Jamal Igle
Basically, earlier this year they added shorts to the Supergirl costume, rather than just the skirt-and-panties getup she's been wearing since her creation, which, combined with flying, results in frequent upskirt fanservice. Nerd rage ensued.