Celine Dion has been bravely battling Stiff Person ... I had to try to be a hero [while] feeling my body leaving me, holding ...

The legendary singer's team took to Instagram Friday to flag fans regarding the artificial intelligence-generated music, calling it the "unsanctioned" use of "Celine Dion's musical performances ...

In the music video, Dion sings the emotional lyrics to the song ... “This man is not just a dancer… he’s an elite athlete, hero, and all-around hilarious person. Follow him on Instagram.