Daryl Hall and John Oates, often referred to as Hall & Oates, are an American musical duo. 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 late 1970s to the mid-1980s with a fusion of rock and roll and rhythm and blues.

The duo's occasional songwriting collaborator Janna Allen died of leukemia in 1993. Hall and Oates released the Marigold Sky album in 1997 (their first all-new studio album in seven years), which included an Adult Contemporary hit "Promise Ain't Enough". They also released a "VH1 Behind the Music" Greatest Hits package shortly after appearing on the show in 2002. At the same time, Daryl and Sara, professional/personal collaborators, broke off their romantic relationship after some three decades. Their friendship is still apparently strong; he has noted her help in his recovery from his 2005 attack of Lyme disease. Hall and Oates released the Do It for Love album in 2003, whose title track was a number-one Adult Contemporary hit. They have also released the Hall & Oates Live DVD from an A&E Live by Request special. This album was the first release (and first success) for their newest joint venture U-Watch Records. Hall has also released the solo albums Soul Alone (1993) and Can't Stop Dreaming (originally released in Japan in 1996), and a live two-disc solo album titled Live in Philadelphia (2004).  Hall and Oates covered Elton John's "Philadelphia Freedom" on the 1991 John/Taupin tribute album "Two Rooms", saying in the booklet: "We chose 'Philadelphia Freedom' because the music is so close to our hearts, and the lyrics represent the way we feel about Philadelphia." Oates released his own solo album in 2002 entitled Phunk Shui and a companion live concert DVD. Hall and Oates also released their first CD of (mostly) covers, Our Kind of Soul, in 2004. It includes some of their favorite R&B songs, such as "I'll Be Around" (their first Hot 100 entry in over a decade), "Love T.K.O.", and Dan Hartman's "I Can Dream About You", among others. Hall and Oates are still on the touring circuit, traveling nearly as much as they did in years past. In addition, a DVD of live performances of the songs from Our Kind of Soul was released in November 2005.  Hall and Oates released a Christmas album, Home For Christmas, on October 3, 2006, which contained two Christmas originals and covers, including a version of "It Came Upon a Midnight Clear", which became their second number one Adult Contemporary hit. Answer this question using a quote from the following article:

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