Little Anthony and the Imperials reached #4 on the Hot 100 in 1958 with their very first single, Tears On My Pillow, after which they struggled for a few years. The next time they got into the top forty came in early 1960 when they released Shimmy Shimmy Ko Ko Bop. The single peaked at #24.
It was a brief respite; the group’s next single only reached #86. They didn’t even reach the Hot 100 at all again until 1964, when their records ignored the chart dominance of the British Invasion and they scored four more top twenty hits.
https://en.wikipedia.org/wiki/Little_Anthony_and_the_Imperials
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What Was Left In 