Alone Again (Naturally) Ice Age 3 Episode The American comedy cartoon "Ice Age 3", which is currently being screened in theaters across the country, uses the single "" released in 1972 by Irish musician Gilbert O'Sullivan. Alone Again (Naturally)", this song appears in the scene where Chestnut floats in the water and watches the squirrel fall in love and feels disappointed. "Alone Again (Naturally)" won the first place on the US singles chart and the third place on the British singles chart.