You might remember her from Confessions of a Shopoholic where she played Isla Fisher's best friend who tried to help her get out of debt. Or maybe you rememebr her from She's Out of My League, or What Happens In Vegas. Ok, admitedly you might not watch as many rom-coms as me, but if you don't remember her from any of those I am sure you recognize her as Jessie's girlfriend on Breaking Bad.
She was the slender, ex meth junky who became Pinkman's landlady and later his old lady. If you still don't know who I am talking about get yourself on IMDB.
In the meanwhile check out howthe amazing Krysten Ritter.