According to the YouTube video description, this sweet duet was a ploy Dad used to distract his little girl. It didn't quite work out the way he had hoped.

In the video below, Benjamin Ames and his 4-year-old daughter perform a charming cover of "Tonight You Belong To Me" — complete with a pink ukelele and faux-trumpet noises. Their duet does not go uninterrupted, however, as the mini songstress intermittently holds up her hand to stop the music. After a few seconds of silence, she proceeds.
Apparently, she thought she was hearing fireworks outside, but her father assures his viewers in the YouTube video description that there was nothing to be heard. Nevertheless, their version of the song is endearing — to say the least — and displays an impressive amount of vocal talent from the pint-sized diva.