If you like the idea of the heart cake, but want something a little less formal, a poundcake is just as impressive! The technique behind it is completely different, using a heart shaped cookie cutter to get your surprise heart design.
Instead of Jell-O shots this would be great with watermelon jello and blue raspberry jello for Serve w/ canned whipped cream. XXL Watermelon Jell-O-Shots. How have I not thought of this? I think I need to try this for the this year.