I came to my Anna Kendrick obsession sideways, in a low-key way I am realizing is very apposite for Kendrick’s brand of celebrity. I have never watched Pitch Perfect. If you asked me which of her movies cemented her in my mind as a celebrity crush, I couldn’t tell you (but I can tell you my fave—more in a moment). To top it off, I found Scrappy Little Nobody as a publisher overstock purchase…