The Blue Things first RCA single, "I Must Be Doing Something Wrong" (written by the three remaining band members) b/w a remake of "La Do Da Da," was released in October 1965. A session drummer was used for the single sessions (in Nashville), as Larzalere had left and Day still had yet to join. Ray Walker, the bass singer from Elvis Presley's backing group The Jordanaires was used by producer Felton Jarvis to augment the group's vocal sound on "I Must Be Doing Something Wrong." and was the only non-Bluething vocal ever recorded. Once again, the single charted locally, but failed to chart outside of the Midwest.