Tropical Beach Palm Tree Sweet 16 Invitations Posted on 2012/05/30 by admin Sweet 16 Luau Party Invitations. A tropical blue sky and beach sand texture with a brown palm tree illustration. Stylish and trendy tropical beach party sweet 16 birthday invitations. product tags: sweet 16 luau, palm tree, aloha sweet 16 luau party, sweet 16 beach party, sweet sixteen hawaiian luau, sweet 16, tropical, beach, luau, birthday, party, invitations,