AMERICAN IDOL: Top 11

When it comes to truly great vocal teachers, there are really only two masters – Barbara Cook and Miley Cyrus. One has 80 years of life experience and is an expert in song interpretation; the other can pole dance. So it was a real coup for "American Idol" to get Miley Cyrus to be the celebrity mentor this week and share the wisdom of her 17 years.Sadly, the fact that the Top 11 contestants

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