LOL!
People who criticize her should consider this though... she truly is important because when Simon is mean, she often comes back at him in defense of contestants, making Simon look mean. This could ultimately make people change their votes based on her reactions and the general unlikability of Simon. (Personally, I love Simon).
She is just too damn fun not to have on the show.
It wouldn't be the same without her rambling comments. When she was talking about the cornflake and the melon Simon had been whispering something to her and was cracking up, too.
She'll never leave the show. She's just too entertaining.