I don't watch American Idol but I've been seeing this guy's name all over the news, so I finally decided a couple of days ago to check him out. I really do like his voice and in some parts his voice reminds me of Clay Aiken, kinda ironic seeing Clay was the one who said mean stuff to him and then later apologized. Here is a performance of him singing Mad World on Regis & Kelly
Oh, there are better versions. National Anthems tend to be designed to be sung by really strong operatic voices, though, so anything less gets the weaknesses really shown up. Happens about 'rocket's red glare' with the US anthem, I think. Most singers' voices just crack at that point.
No shame for a Pop singer not being able to do it, though. Definitely not their kind of song.
I'm sure Kelly sounds great. She does have the vocal strength.