Thorleifs was a Swedish dansband, formed in 1962 in Norrhult, Kronoberg County, Sweden and led by Thorleif Torstensson. The band sings in Swedish and many other languages, and released some albums in German. It also took part in Melodifestivalen 2009 with the song "Sweet Kissin' in the Moonlight" but did not proceed into the finals.

Source: Wikipedia (https://en.wikipedia.org/wiki/Thorleifs)