That's just what two parents got a peep of as they sang "If You're Happy and You Know It" while a technician performed a routine 14-week ultrasound.

The video, posted on YouTube by user Jen Cardinal, shows the parents singing and the baby clapping — just at the right moments.

In an interview with Today, the mother admits that while the baby clapped three times spontaneously, the doctor actually rewound the ultrasound tape so they could sing along to the baby's movement.

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“Our members cannot be bought off,” General President Sean O’Brien said in a social media statement, calling UPS' offers “illegal and haphazard.” (Hyosub Shin/AJC 2023)

Credit: Hyosub Shin/AJC