Question: The Statler Brothers had their biggest country hit with "Do You Remember These" in 1972, but which famous singer did they sing backup for?
Sentence (from "The Statler Brothers Show"): The show's theme music is an instrumental of "The Class of '57," one of the Statlers' biggest hits as performed by the Bill Walker Orchestra, which along with the Statlers' band, provided all the music for the show.
Relevant evidence: No