This is a SMART Notebook file (You must have SMART Notebook), which I've been using for the past 8 years. This recently updated version makes it easy to choose a genre for a birthday song and allows the kids to sing along.
It allows students to choose which version of "Happy Birthday" they'd like the class to sing for them. Choices include Jazz, Rock, Latin, Ragtime, Bluegrass, Disco, Techno, Hard Rock, Motown, AND a custom Sports song (Made to remind students of The Sabre Dance) and a Super Mario version of my own creation based on the NES video game.
All songs are in the key of G and singable by elementary schoolers.