It's Supergirl_modern_tf, with a stellar standard skin by the inimitable Interceptor!
Interceptors skin on the left, my effort (also included, no extra charge) on the right.
(http://i15.photobucket.com/albums/a384/tommyboy2002/supergirl_modern_tf2.jpg)
(http://i15.photobucket.com/albums/a384/tommyboy2002/supergirl_modern_tf3.jpg)
Get her here:
http://tommyboymeshes.freedomforceforever.com/DC%20meshes%20S.html