Underdog = expected to lose a contest, at a disadvantage.
Dark Horse = one who achieves unexpected support; a little-known, unexpectedly successful entrant

Kris Allen = under-dark-horse-dog! Pretty much sums up his journey

There have been a lot of odd final two match ups - but this one has got to be the oddest. And by odd I mean the most different musically. They are really on polar opposites - hard rock vs. soft rock. The other odd couple that comes to my mind would be Carrie and Bo.

Adam will need to tone it down if he has any shot of winning - less screaming and more singing. Danny's followers will most likely NOT vote for Adam.

Kris will need to do pretty much exactly what he did on Tuesday to win. An unplugged version of a song with the guitar, a little piano playing, and a lot of heart. He will certainly pick up some Danny votes.

Also, both should not do any repeats - I totally agree with Geekboy that repeating songs is a bad thing - we've already heard/judged/decided your talent on previous songs - bring us something new.

I am VERY excited about this final match up! Both are worthy of winning. Both will have amazing careers after Idol. Both bring something different and are very talented in their own right. It's going to be a Ruben/Clay photo-finish!

(PS I have a hard time with the David Cook comparison because he was my favorite throughout last season and I always knew he would win. But that's just me.... )