There are some songs that don't get as much love in the MLP:FiM fandom or here on Everypony Sings. Fortunately, Ivory Keys is here to pay attention even to the less-popular songs.
In this case, Ivory Keys wrote sheet music for Pinkie's Gala Fantasy. Remember that one? Pinkie was so excited to go to that party. All that candy! And you can relive the excitement by playing the song yourself.
Thanks to Ivory Keys!