I'm thinking that Patsy and Gavin will definately go before Ann (probably in that order but it doesn't really matter), then, if it's a double elimination on semi finals night, it'll be Pamela and one of Ann or Kara to go, leaving Matt, Scott and one of Ann or Kara in the final.
This is, of course, just pure guesswork based on my assumption that Matt, Scott and Ann are well ahead in the voting but I could be wrong (and wouldn't mind if I was) and Kara may be picking up more votes now.