220px-groovin#13 – The Young Rascals – “Groovin'” – (1967)

This top five album from The Young Rascals (later, The Rascals after they presumably aged a to hit whatever arbitrary age they decided they were no longer “young”) features this #1 hit. It’s a great summer song and pretty relaxing: perfect for dropping acid in the middle of a park in the 1960s.