I think Katharine goes home next week. I think she is the weakest link.
So far the voting public has done well.
Mandisa was better than Kat. I think Kat stayed because she's better looking, not because of her better talent.
I think that between Kat and Elliott, the one going home next week will be the one with the weakest performance. That said, I think Elliott has an edge on Kat next week, just because audiences are used to hearing the King's songs in a male voice, not female. And audiences tend to like what is familiar to them, as long as it is well done.