How great is this friendship. Luke McMohan and Blair are friends since preschool. She is suffering from Sanfilippo syndrome which is a degenerative disease. It’s Blair’s 15th birthday and Luke decided to make it a huge celebration also he wanna make something helpful for this young beautiful girl. Thus Luke composed a song called “I Won’t Let Go” with touching lyrics and a piano accompaniment just for his dear friend and her disease. His performance will bring you to tears.