As one of its daily deals, Amazon offers Prime members the Disney Girls' Princess T-Shirt 3-Pack for $15.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's $4 off list and the lowest total price we could find. Each set has an Ariel, Cinderella, and Aurora shirt. They're available in sizes 2T to 6x. Deal ends today.