Then there are The Marcells. Great song!
The first crossover recording to rock and roll came from Elvis Presley, but the version that really stirred things up came from The Marcels, a doo-wop group. In 1961 the Marcels had 3 songs to record and needed one more. Producer Stu Phillips did not like any of the other songs except one that had the same changes as Heart and Soul and Blue Moon. He asked them if they knew either, and one knew Blue Moon and taught it to the others, though with the bridge or release (middle section - "I heard somebody whisper...") wrong. The famous introduction to the song ("bomp-baba-bomp" and "dip-da-dip") was an excerpt of an original song that the group had in its act. The record reached #1 on the Billboard Pop chart for three weeks and #1 on the R&B charts. [3] The Marcels version of "Blue Moon" sold a million copies, and is featured in The Rock and Roll Hall of Fame's 500 Songs that Shaped Rock and Roll.