Sweet 16 Birthday Party Invitations Is your little princess all grown up? Now’s the time to throw her the sweet sixteen birthday party she’s always dreamed of. From Pretty in Pink and Cinderella to Mardi Gras and Luaus, we offer invitations for every theme imaginable. If you can’t find what you’re looking for in the Sweet 16 category, simply reference our overall party list. With over 400 themes to choose from, you’re sure to find the perfect invitation to celebrate the occasion.