It wasn’t until 1966 that the group changed their name to the Delfonics.

(Cain would later leave in 1971 and Major Harris replaced him.)

They released their first single, “La-La (Means I Love You)” in 1968.

William Hart

William Hart in 1968.Don Paulsen/Michael Ochs Archives/Getty Images

The song would go on to be one of their best-known hits, topping out at No.

4 on the Billboard Hot 100 singles chart.

As the group’s lead songwriter, Hartonce toldTheGuardianthat his song ideas often came to him in dreams.

“I have no idea where the melodies or lyrics came from,” he said.

“God, maybe.

They just popped into my head and I started writing.”

In 1975, the Delfonics split into two groups, with both continuing to tour over the years.