(CNN) Add music therapy to the list of "Old Town Road's" accomplishments.

The crossover hit by rapper Lil Nas X has burned up the charts and started conversations about the definition of country music.

Now a mom is saying it's helped her mostly nonverbal autistic son find his voice.

Sheletta Brundidge of Cottage Grove, Minnesota, recently tweeted a snippet of a video showing her 4-year-old son Daniel humming and singing the tune.

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