Eurythmics are a British musical duo, formed in 1980 by singer Annie Lennox and musician Dave Stewart. The pair have achieved significant global, commercial and critical success, selling 75 million records worldwide, winning numerous awards, and have undertaken several successful world tours. They are Britain's biggest selling duo, and are noted for their songs that showcase Lennox's powerful and expressive alto voice and Stewart's innovative production techniques. Eurythmics' commercial breakthrough came with Sweet Dreams (Are Made of This) released in January 1983. The successful title track featured a dark, powerfully sequenced synth bass line and a dramatic video that introduced the now orange crew-cut Lennox to audiences. The song reached no.2 on UK singles chart and topped the US charts. Other hits: "Who's That Girl", "Who's That Girl", "Here Comes the Rain Again", "Sexcrime (Nineteen Eighty-Four)", "There Must Be an Angel (Playing with My Heart)", "Sisters Are Doin' It for Themselves" (w/ Aretha Franklin), "Missionary Man"