That's right, according to a source, Joan may be more on the mend than we might think:
While performing at a U2 concert in Nashville, lead singer Bono saw a man in the audience with a sign that read, "Blind Guitar Player. Bring Me Up." So what did he do? Brought him on stage, of course.
Watch the amazing duet (above). And we dare you not to shed a tear when Bono gives the guy his guitar.