In my opinion...the girl can not sing at all. She doesn't have the personality that her sister does so that can't even carry her. From what I've seen of her, she comes across as a spoiled brat and should find another career choice for her future....BUT...I do not think it was right for the crowd to boo her. She's only 20 years old...that had to really hurt, and it is in poor taste for the crowd to carry on like that. She isn't the opposing team, she's just an untalented girl trying to ride on the success of her older sister and obviously no one that cares about her has the guts to tell her she should try something else more suited to her abilities.