If it's three in the final
Next Week: Wagner and Cher out
Two weeks time: Katie and Mary out
3rd - Rebecca
2nd - One Direction
1st - Matt

Four in the final
Next week: Cher (and Wagner) out
Two weeks time (Wagner and) Mary out
4th - Katie
3rd - Rebecca
2nd - One Direction
1st - Matt

Five in the final
Next week: Cher out
Two weeks time: Wagner out
5th - Mary
4th - Katie
3rd - Rebecca
2nd - One Direction
1st - Matt

bump.

Looks plausible enough. Not sure that Katie will ever get more votes than Mary or Wagner though.

Next week

Matt
One Direction
Cher
Rebecca
Katie
Wagner
Mary

Wagner gone in sing off

Semi Week

Matt
Rebecca
One Direction
Katie
Cher
Mary

Top 3 into final everyone else eliminated

I'm guessing:
7. Wagner (he can't go on much longer)
6. Katie (same)
5. Mary (she's becoming boring now)
4. Cher (any other year, she'd win, but she's swallowed up by M and R)
3. Rebecca
2. One Direction
1. Matt