Question: Who sang lazy hazy crazy days of summer?
Disambiguated questions and answers: question: Who sang lazy hazy crazy days of summer in German?
Who sang lazy hazy crazy days of summer in English?
answer: Willy Hagara
Nat King Cole
Nathaniel Adams Coles
Natural Questions answer: Nat King Cole (from the Wikipedia article "Those Lazy-Hazy-Crazy Days of Summer")