Question: Who sang where were you when i needed you?
Disambiguated questions and answers: question: Who sang Superwoman (Where Were You When I Needed You)?
Who covered the song Superwoman (Where Were You When I Needed You) in 1973?
Who sang the song Superwoman (Where Were You When I Needed You) in 1978 for their album Sounds...and Stuff Like That?
answer: Stevie Wonder
The Main Ingredient
Quincy Jones and Patti Austin
Natural Questions answer: the Grass Roots (from the Wikipedia article "Where Were You When I Needed You")