Mischa took a break from pimping Keds all over the place to step out with a new guy in London this week. She took him to see her favorite band, Kings of Leon. We're not sure who this guy is but Mischa seems to be having a pretty good time with him. He's obviously protective of her and he didn't even seem to mind that she tucked her Fleetwood Mac t-shirt into her skirt! What was she thinking with that look?