I don't believe McPhee or Paris consistently outsings her, Elliot always does good but he's a goofy lookin' dude and will be booted off within the next couple weeks. Not because of his voice but because of his image. He isn't Ruben Studdard or Chicken Little enough to get those type of votes. Just like in politics, its not always the positions or platform the candidate takes their image is also a factor.
Tell me which weeks she outsang the other two women. Add it up and they have basically done a better job than she has. Tonight she was boring, she mangled the song in too many places and both McPhee and Paris showed that they are that much better than her.
Elliott's modesty is his downfall I suppose but he has a lot of fans who like the fact that he's not an a$$hole.