There is more than one artist with this name: The first one was a 1970s funk band, best known for launching the career of their lead singer, Chaka Khan. They had a number of major hits during their career, including "Tell Me Something Good," "Sweet Thing," and "Ain't Nobody" . The second one is a Czech band from Litomyšl. http://www.rufus.cz/. Third one is a Brazilian band from Florianópolis. The band perform their own songs, which are a fusion of different styles, resulting in experimental but raw instrumentals, with emotional lyrics.