Eliza Dushku, oh yes.
A (normally) straight girlís crush on another girl, often a celebrity. Is mostly platonic in nature.
A girl who is girlcrushing must by definition be straight, otherwise itís just a regular crush.
i.e. I have such a girlcrush on Angelina Jolie/Keira Knightley/insert name here.
Sorry if this shows up for you twice, I had to edit the image to add a watermark. Believe me, I don't like it either.