Listen to S.I.M.P. (Squirrels in My Pants) online. S.I.M.P. (Squirrels in My Pants) is an English language song and is sung by Little Apple Band. S.I.M.P. (Squirrels in My Pants), from the album Your Favorite Kid's Songs: 50 Songs from Phineas and Ferb, The Muppet Show, Sesame Street, Fraggle Rock and More!, was released in the year 2012. The duration of the song is 1:35. Download English songs online from JioSaavn.