Singing Horses is the famous internet game and now available on your smartphone. I bet you have received it in your mail a couple of times over the years.
It is a hilarious activity, make your own choir of singing horses. Click on the horses one by one and make your own song. Each horses has its own voice/characteristics and it will soon drive you and all of your friends crazy.
Singing horses is a game distributed by Animgram, go visit www.animgram.com or look in the app store by searching for Animgram.