Question: Who sang what a difference a day make?
Answer: Dinah Washington
Disambiguated questions and answers: question: Who originally sang the Spanish version of what a difference a day make?
Who sang the version of what a difference a day make that won a Grammy?
Who sang what a difference a day make on SNL in 1975?
answer: Nestor Mesta Chayres
Ciudad Lerdo
Nestor Chaires
Ruth Lee Jones
Dinah Washington
Esther Phillips
Esther Mae Jones
Natural Questions answer: popularized by Dinah Washington (from the Wikipedia article "What a Diff'rence a Day Made")