Department of Education spokeswoman Jessica Scaperotti gave The Post an explanation staffers said they never heard — that Hawkins found the lyrics “too grown up” for 5-year-olds.

The song starts: “If tomorrow all the things were gone, I’d worked for all my life. And I had to start again, with just my children and my wife, I’d thank my lucky stars, to be livin’ here today.”

Scaperotti said the department supports the principal’s decision. “The lyrics are not age-appropriate,” she said.

But Justin Bieber’s flirty song about teen romance, “Baby,” was deemed a fine selection for the show. Hawkins had no problem with 5-year-olds singing lines such as, “Are we an item? Girl, quit playing.”