Just click on the download button, you can get happy birthday song download as well as happy birthday video download. besides, we provide the youtube videos of following birthday music, happy birthday to you sheet music for guitar. happy birthday piano sheet music. happy birthday song ukulele sheet music.. For a tune so widely reproduced as happy birthday, it follows that there is no one set key. considering we’re playing this on a guitar, let us for sake of ease, pick the key of g . here are the 4 chords:. » ♬ happy bday song tagalog version