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Now Playing: GMA LIVE! (6.24.14)
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Now Playing: 'GMA LIVE!' (6.23.14)
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Now Playing: GMA LIVE! (6.20.14)
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Now Playing: 'GMA' Hot List: Michelle Williams opens up about how she became engaged
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Now Playing: Shania Twain apologizes for comments made about Trump
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Now Playing: Tracy Morgan on giving back to Brooklyn, dinner with Morgan Freeman
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Now Playing: Brett Young gives a special performance of 'Mercy' on 'GMA'
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Now Playing: 'Harry Potter' opens on Broadway to rave reviews
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Now Playing: Prince William, Princess Kate welcome baby boy
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Now Playing: Beyonce was back at Coachella with some surprises