Moonlight Birthday

Like Beethoven's Moonlight Sonata? Like Happy Birthday. This is the perfect combination of the two. 
 
It starts exactly like Beethoven's original, then midway through it changes to Happy Birthday. It's in the original key of C sharp minor, and changes to E major.
 
It's the best version of Happy Birthday I can think of to teach my piano students! I hope you enjoy it too!