Hall & Oates guest appearances together

1976 Apple Pie (Movie) - Daryl Hall & John Oates band jam.
1978 Todd Rundgren - Hello It's Me (Live) (H&O sing background) Hello It's Me [Live Version - 1978] 
1979 Ellen Shipley - Daryl & John sing background vocals on the self titled album
1985 Michael Jackson & Lionel Richie - We Are The World Hot 100 #1
1985 Artists United Against Apartheid - Sun City (H&O sing background)  US Hot 100 #38 / UK #21/ Aus #4
1988 Eddie Kendricks - One More For The Lonely Hearts Club (With David Ruffin) H&O co-produce R&B #43

1989 Hall & Oates - Love Train (Earth Girls Are Easy - Soundtrack)  Japan (Tokyo) #20
1990 Hall & Oates - Can't Help Falling In Love (Last Temptation of Elvis - Tribute album)
1991 Taj Mahal - Don't Call Us (H&O sing background)
1991 Taj Mahal - Scattered (H&O sing background)

1991 Hall & Oates - Philadelphia Freedom  -->  Two Rooms Documentary
1992 桑田佳祐 Keisuke Kuwata - Lady Luck
1992 桑田佳祐 Keisuke Kuwata - She's a Big Teaser

1999 Hall & Oates - And That's What Hurts (Runaway Bride soundtrack)
2002 Hall & Oates - Close To You (Triple M Musical Challenge)
2007 The 3 Tenors of Soul - All The Way From Philadelphia
2009 Listen (Album of songs written by children who stutter) - Nothing In This World by H&O
2009 Jimmy Wayne - Sara Smile (H&O sing background vocals) Country #31

2010 All My Friends Are Here - Arif Mardin Tribute