Daryl Hall and John Oates are an American pop rock duo formed in 1970 in Philadelphia. Daryl Hall is generally the lead vocalist; John Oates primarily plays electric guitar and provides backing vocals. The two write most of the songs they perform, separately or in collaboration. They achieved their greatest fame from the mid-1970s to the mid-1980s with a fusion of rock and roll and rhythm and blues. Hall and Oates have sold an estimated 40 million records, making them the best selling music duo in history. They are best known for their six No. 1 hits on the Billboard Hot 100: “Rich Girl”, “Kiss on My List”, “Private Eyes”, “I Can’t Go for That (No Can Do)”, “Maneater”, and “Out of Touch”, as well as many other songs which charted in the Top 40 including the singles “You Make My Dreams”, “She’s Gone”, “Say It Isn’t So” and “Sara Smile”.