The Happiest Song in the World was an ad campaign created for GEICO in collaboration with the iAd team at Apple. Happy lyrical options would cycle every time you strummed the guitar, hit the drums, or tapped the piano keys. You could also directly select the lyrics. Then a custom song based on your lyrical selections would be generated. You could hear it, download it, and play the game again. GEICO offers you the best custom options and the happiest customer experience. Stay happy by customizing your very own Happiest Song in the World.