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McCartney's Octopus Moji

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Paul McCartney, left, and Ringo Starr on stage Sunday at the 56th annual Grammy Awards in Los Angeles. Matt Sayles/Invision/AP hide caption

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Paul McCartney, left, and Bruce Springsteen during Saturday's show in Hyde Park — before the plug was pulled. Frame grab from video posted by "BenR753" on YouTube. YouTube.com hide caption

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