We're obsessed with pie, as you can tell from this slide show, and our obsession will be shared across the country this weekend. National Pie Day is Sunday, but you can enjoy the classic American dessert today for free at both Norma's Café locations (1123 W. Davis St., 17721 Dallas Parkway). Purchase any entrée and choose a slice of free pie -- blueberry, apple or even one of their signature mile high creations. Hurry though, because this is one holiday everyone's going to be celebrating.