==Couldn't hear herself== 
 I'm not sure how you show technical issues like that.  All I saw were claims that she couldn't hear herself.  You see Jessica claim that Ashlee touching her ear means she is having technical issues, and you hear commentary made after-the-fact which also claims that that is true.  The simple fact is, at the very end, when the band went silent and she was still singing, she could hear herself.  Judge for yourselves if she was in tune then.