The single would become one of the biggest double-sided hits of the rock era.

Disc jockeys flipped the single and made it a double-sided hit.

The double-sided hit sold approximately 1.1 million copies in 1964.

These songs convinced Capitol Records to release the demos as a single; they became a double-sided national hit.

The afternoon session resulted in a double-sided hit on both the country and pop charts.

The song was part of a double-sided hit; the flip side was "Sentimental Me."

But the fact that it was a double-sided hit gives it a big advantage over these other songs.

The album's single, "Pleasant Valley Sunday"/"Words", was a double-sided hit.

By the early 1970s, double-sided hits had become rare.

The practice was adopted by The Beatles, who consciously intended for many of their singles to be double-sided hits.