by Rob BowmanThe Staples' first album produced by Al Bell and recorded in Muscle Shoals hit the winning formula. Other changes saw Pervis Staples departing just before the album was recorded and being replaced by sister Yvonne Staples. Everything was now in place for the Staples' golden years. Three songs, "Heavy Makes You Happy," "Love Is Plentiful," and "You've Got to Earn It," all charted.