Did You Know? Keep On The Sunny Side was recorded and popularised 1928 by the family of June Carter, Johnny Cash's wife, she sings the second verse on his version and their daughters join in on the chorus.
Did You Know? Sloop John B was originally an old folk song from The Bahamas. It took Brian Wilson less that 24 hour to come up with this incredible arrangement and they released it as the first single from Pet Sounds.