In Greek mythology, Calypso was the daughter of Titan who lived on the island of Ogygia, where she detained Odysseus for several years. Calypso was a nymph, a mythological spirit of nature imagined as a beautiful maiden inhabiting rivers, woods, or other locations.

“Calypso (Rarities & B-Sides)” was initially teased by Chris during live streams and Instagram posts. The track was released on iTunes in June 2012 as a standalone single, along with the remix of “Oh Yeah,” and later included on the expanded version of Fortune.