Lily Allen, Drugstore Cowgirl

What was Lily Allen buying at a pharmacy during a recent traipse through the streets of London, and why was she dressed like a long-lost Von Trapp kid when she was buying it?

We won't even begin to speculate about the chanteuse's unfortunate choice of duds. But we can't help but obsess over the contents of her shopping bag.

Weight-loss supplements? Vanishing cream? Something for her chronic case of diarrhea of the mouth?  

And why does she appear to be sucking her thumb as she contemplates the traffic?

Frankly, we're stumped, but maybe that's not a bad thing. We suspect that, the less known about what goes on in Lily Allen's head, the better.