I know someone that tried out for one of those talent shows. The guy plays with a college roommate of mine and I have seen them play a few time and partied with them a few more times. Here is a promo trailer where he is flashed up there for about a second at 15 seconds in shortly after they say "We are here to find a superstar." That is his gravelly voice singing at that point.
This is the guy:
His name is Josh Krajcik, pronounced like magic but with a Kr instead of m. He is a great singer and guitarist. They did well in a battle of the bands contest in Cleveland a couple years ago and one of the judges compared him to a new Stevie Ray Vaughan, article here. Of the bands my roommate played with (that I heard) this is the one that I thought would have the best chance of making it. They made a couple CDs I enjoy them both, they are on Amazon and iTunes.
The internet rumors say that he made the top 32 on the show. I wasn't planning on watching but I will be now, and voting. I do hope he does well.