Jade Burke, 14, from Glasgow, had recorded the clip eight months ago - when she was 13 - as practice for the Edinburgh Mela Festival.
It came to the attention of Seattle radio station 95.7 KRJ who asked Jade's mum Wilma for permission to share it with their 2.5 million fans.
And the next day, Jade woke up to thousands of messages on her Facebook page saying how much they loved her voice.
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"I've posted quite a lot of videos up there but I think that one shows off the range of my voice the best.
"Mum would play a lot of Whitney Houston in the car when I was growing up and it's obvious why she's such a musical legend.
"My dream duet would be with someone like Adele or Ed Sheeran. If they ever wanted to then that would be brilliant."
Mum Wilma, 55, said: "That video is actually from about 8 months ago so she was 13 at the time and the radio station approached me to see if it was ok.
"And I said it was fine not noticing just how popular their page was because we get quite a lot of requests and we usually just say 'yeah, that's fine'.
"So, that was just a practice video that she had sent to the Edinburgh Mela festival who had asked her to try singing it."
The American radio station have 2,541,478 likes on their Facebook page.
Their post said: "AMAZING! She is only 13 but her voice has much POWER and SOUL to sing 'I Will Always Love You'.
"Jade you have an amazing future."