This is the 16th Street side of the Starbucks at 16th and Walnut Streets. It's haunted. Check it out:
Here's a closeup:
When I emailed the pics from my phone so I could easily save them to a folder, I referred to her as "Creepy Starbucks Girl."
I'm assuming this is another example of street art, although it's not as easy to spot as you'd think. You kind of have to be looking in that direction.