Personalized UnBOOlievably Cute Youth T-Shirt. Halloween Youth T-Shirt - Black with a cute smiling little ghost and purple spider says I'M UNBOOLIEVABLY CUTE! Perfect for your little ghost or goblin. 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.