Donny Hathaway - Unsung (2008)

Donny Edward Hathaway (October 1, 1945 – January 13, 1979) 

was an American soul singer, keyboardist, songwriter, and arranger. 

His enduring songs include 

"The Ghetto", 
"This Christmas", 
"Someday We'll All Be Free", 
"Little Ghetto Boy", 
"I Love You More Than You'll Ever Know", 

signature versions of 
"A Song for You", 
"For All We Know", 

"Where Is the Love" 

"The Closer I Get to You", two of many collaborations with Roberta Flack. 

"Where Is the Love" won the Grammy Award for Best Pop Performance by a Duo or Group with Vocals in 1973.