I think and want to believe that Lauren, Pia and Haley will be here to stay.
It's just a matter of time before Karen and Naima goes home. As for Thia, if she actually start performing decently, she still has a shot at this.
As of now, i believe that Lauren, Pia and Haley should be in the Top 8 or Top 7 at least.
Next week, i think either Karen, Jacob, Naima and Paul will be in danger. I have a gut feeling Karen's run for AI will be over next week.