Cornelison also does the National Anthem before Blackhawks games, usually with a veteran at his side. He sings as it should be sung.
http://www.youtube.com/watch?v=CQapVXMMawI
When the Hawks won the Stanley Cup in 2010, they gave Cornelison a Championship Ring. I believe he wears it when he signs at United Center (but I will check to make sure when the Hawks come back after the Olympics).
US National Anthem drowned out by cheers at 91 NHL All Star
I was there and it was deafening. And the cheering is not disrespectful, it was in response to a game in the 80's where some Canadian fans booed our anthem.