Donning boxing gear during their introductions, David Cook and David Archuleta put on a classic battle during the American Idol finals.

But which singer delivered a knockout performance? Here's a look at the third song each sung last night. Decide the winner for yourself...

David Cook, "The World I Know":

[youtube]http://www.youtube.com/watch?v=Jv8ktz-IbOU&eurl=http://www.tvfanatic.com/videos/the-world-i-know/[/youtube]

David Archuleta, "Imagine":

[youtube]http://www.youtube.com/watch?v=Vs_BdVFH7CA&eurl=http://www.tvfanatic.com/videos/re-imagined/[/youtube]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.