Question: Who sings monday monday so good to me?
Disambiguated questions and answers: question: Who sang the original version of Monday, Monday in 1966?
Who released three versions of Monday, Monday so good to me?
Who sang Monday Monday so good to me on their album Under the Covers, Vol. 1?
answer: the Mamas and the papas
Wilson Phillips
Matthew Sweet and Susanna Hoffs
Natural Questions answer: the Mamas & the Papas (from the Wikipedia article "Monday, Monday")