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 Wonâ€™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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