Although Farah tries her best (given her limited knowledge of music) to provide her analysis about the singing aspect of a contestant, her focus on the show is clearly on the performance. However, I think she focuses more on looks and fashion than on performance. She has made so many comments about how a person looks, or the clothes they wear or the shoes they have worn, etc.
I find that very hypocritical on her part as she dresses horribly herself. Nobody would mistake her for a fashion diva or a good looking person. I feel she loses all her credibility when she focuses on these things. The show is NOT about how good looking you are or how you dress (granted, nobody wants to see an Indian Idol who has absolutely no dress sense).
She needs to realize that many of these contestants come from humble backgrounds and have been focused on singing and not on fashion trends, where they neither have the means nor the guidance regarding these aspects.