I've never been one for bows in girls hair, but if you've gotta have a bow to solidify the sex of your little one, then my vote is for this number, which features loveable pink and white skull and crossbones on a chocolate brown background. Now grandma can't complain you don't dress her like a girl!
The pink and brown skulls design ($5.99) is from 2 Lil Angels Boutique, which also carries a bevy of more traditional (but not too traditional) bows, headbands and pacifier clips.