So we went to Hobby Lobby (I think they have some of the most realistic silk flowers).. obviously I couldn't use live lilies as they are not food-safe. We were in search of purple lilies, since purple was the main shower color. We found purple lilies but only in a small bushel, which actually works great for cupcakes because the blooms are mini-sized. Sometimes these flower bushes can be expensive but HL floral was 50% off that day so I paid just $5 for about 40 lilies! I snipped the flower part off each individual stem, leaving a bit of stem on to shove down into the frosting - worked out great!
I made simple chocolate and vanilla cupcakes topped with vanilla buttercream - and a lily. Here's how they turned out.. ohhh the elegance!