Ok people, Grubbie Style says that they have hip t-shirts for boys, but I would say they work for little girls too (if you're into gender-neutral stuff). On the Grubbie Style website you can make your own shirts: pick a design, pick the art color, pick a shirt. Yay!
I especially love this one since Jo is my little monkey.
Although this one may be more appropriate for Jo's size at the moment.
They're also on sale on Zulily today. Seriously on sale. Stock up, folks.