i started from casey but here are my thoughts.
casey - fucking awful. she absolutely raped that song up the ass. obviously she was so preoccupied with doing something new and different that she couldn't just present the song well as is. i said 'uhh, she does realise that there's than one sentence in it right?'. next time concentrate on learning the fucking words.
marty - i really enjoyed this although something turns me off about marty, not quite sure what. as has been said many times, he picked a really hard song because lennon just sounds SO incredible on the original that marty never was really going to improve the song.
hayley - boring. she has a good voice but she is not a performer. the only song she's done i've really enjoyed is weir. she basically looked into the camera and sang. it's obviously a very emotional song but i wasn't feeling it. also how much did she turn mark down?
courtney - why did the judges like this so much? i thought it was awful and he butchered the song. for shame.
ricki-lee - ok, i'm going to change gears now and say, why didn't dicko like this? i think she's fantastic. yeah, it was a very poppy version, but she did it well, she was engaging and i know the song fairly well and i didn't notice that she forgot the lyrics. it definitely wasn't a perfect performance, but compared to the steaming piles of shit that were everyone else's performance bar marty, it was up there.