Personalized So Cute Princess Youth T-Shirt. Youth T-Shirt - Kelly Green with a pink crown says I'M SO CUTE I MUST BE A PRINCESS! Perfect for a royal baby girl. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.