Many readers may remember Susan Boyle, the lady who won over the "Britain's Got Talent" judges and scored a recording contract. I would direct your attention to Jamie Pugh, who in his own right has done well with "Bring Him Home," a good song from a great musical, Les Miserables.
I was moved to tears--not so much by the song as by the reaction of the audience and judges, and this in light of his story (he's a pizza delivery guy who likes to sing). For that, however, you'll have to go onto YouTube yourself.
He's a poster-man for living one's dreams. Give credit to shows like BGT and American Idol for being a loudspeaker for people with good voices.