This was Sedaka's first Top 10 hit - his first charting hit was "The Diary
" in 1958 at #14. It's easy to see from here where he gets that swagger. You see, Rich Podolsky's book Don Kirshner: The Man with the Golden Ear
tells us that in school, Neil was the nerdy kid who'd rather practice piano than play football, so he got picked on a lot. That all changed when he performed at the Lincoln High School Ballyhoo Variety Show, with a song called "Mr. Moon," a lively bump-n-grind example of what was then considered the "new rock n roll." The audience went crazy over it, but the principle called Neil into his office and forbid him from ever playing the song in school again, saying, "I will not tolerate that kind of reaction among the students." The student body actually signed a petition
to demand that the school allow Neil to play the song again at a talent show, again to an adoring audience. You'd be pretty sassy too, with a back-story like that.