Question: Who sings what a wonderful world it would be?
Disambiguated questions and answers: question: Who sang the original version of What a Wonderful World it would be?
Who sang an uptempo version of What a Wonderful World it would be?
Who sang What a Wonderful World it would be on the album Otis Blue?
Who sang What a Wonderful World in 1978?
answer: Sam Cooke
Herman's Hermits
Otis Redding
Art Garfunkel with Paul Simon and James Taylor
Natural Questions answer: Sam Cooke (from the Wikipedia article "Wonderful World (Sam Cooke song)")