Personalized Heart Belongs To Mummy Boy Youth T-Shirt. Halloween Youth T-Shirt - Black with a cute baby boy mummy with two front teeth and his jack-o-lantern. He says MY HEART BELONGS TO MUMMY. 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.