Chester is very good. I have no clue who he is, but he sings quite well.
he sings for linkin park. everyone automatically hates him because the band were classed as nu metal back in the day
So true, he does have a great singing voice but because he's in Linkin Park everyone automatically thinks he's not talented.
He also did a re-recorded version of Home Sweet Home with the Crue last year, you should check it out too because he sounds great there.
Edit: You can Watch/Listen to it here
http://www.youtube.com/watch?v=IhgQR0aJ2isShit, he blows Vince away, which isn't hard to do, as you said, 20,000 people do it every show.