Here's a great image of Supergirl in action at the ruins of Argo City. It was created by comic book artist Mahmud A. Asrar. There's a couple other images of Supergirl below to check out. Do you like his design of the character?
Source: Deviant Art (http://anjum.deviantart.com/art/Supergirl-5-Pages-5-6-282552892)