I haven't been watching it this year, but Lambert's definitely extremely talented. "Mad World" is the only thing I've heard him sing... thanks for posting the link, Sniper.
Don't mean to hijack, but for anyone who doesn't believe you can catch some amazing talent on a show like this, the gold standard for me has been Jordis Unga doing Baba O'Riley on Rock Star INXS... turn this up and get your ears pinned back... soulful, killer phrasing, and just raw power:
http://www.youtube.com/watch?v=uVnTfZFP4yU