15-year-old Luke McMahon has been friends with Blair Chapin since preschool. Blair suffers from Sanfilippo syndrome which is a degenerative cell disease with no known cure. For her birthday, Luke decided to help raise awareness of Sanfilippo in hopes of finding a cure one day. So he penned an original song called 'I Won’t Let Go' and dedicated it to Blair. And when you hear these beautiful lyrics, you'll be wiping away the tears.
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