Listen to Today Is Gonna Be a Great Day online. Today Is Gonna Be a Great Day is an English language song and is sung by Little Apple Band. Today Is Gonna Be a Great Day, from the album Kids Songs! Fun Children's Music from Sesame Street, Phineas and Ferb and More!, was released in the year 2012. The duration of the song is 2:55. Download English songs online from JioSaavn.