Willie Nelson, America's iconic country music singer, has logged lots of miles. And, today, he turns 80, with more than 60 studio albums, 10 live albums, and 27 collaborations to his credit. Recently, Nelson showed that he has a little more tread on his tires when, while visiting Conan O'Brien's show, he shot a short audition reel for Peter Jackson, hoping to land the role of Gandalf in The Hobbit sequel. It's doubtful that, wherever he is, Ian McKellan is breaking a sweat.
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