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Celebrating 50 Years of 'It's a Small World'

"GMA" celebrates the birth of the Disney attraction and song with a sing-along.
6:49 | 04/10/14

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Transcript for Celebrating 50 Years of 'It's a Small World'
And some girls, celebrating a special birthday with our parent company. 50 years ago, the famous song and attraction, "It's a small world," was born here in New York at the world fair. Sara Haines went to see how it's doing after a half-century. ? It's a small world after all ? ? it's a small world after all ? Reporter: It's the song the whole world seems to love. ? Friendship to everyone although the mountains divide ? ? it's a small, small world. Reporter: With the words we can't seem to forget. In any language, in every corner of the world. It's the theme song for the extraordinary boat ride at Disney parks around the world. On any given day at any given moment, the song is playing somewhere in the world. We all come to this happy place, welcome. Reporter: Millions go to their happy place when they visit. Like 5-year-old Luke from Wisconsin. I love this. Reporter: You loved it? Yeah. So magical. Reporter: Magical, exactly what Walt Disney intended. ? It's a small world after all ? It's the most unique musical timepiece ever created. Reporter: The attraction premiered at the world's fair in New York, in 1964. Two years later, at disneyland, Walt Disney and an international group of children, christened the ride with water from every ocean. What was Walt Disney's division for "It's a small world." A vision of peace and unity and hope around the world. Reporter: It's an attraction of art, precision and beauty. I sailed through the world that I, too, once visited as a child. I also got a sneak peek behind the scenes. The control room that dispatches the boats. And backstage, the dolls' dressing rooms. There's over 5,000 costume pieces in that attraction. That includes the jewelry, the hats, the socks and shoes. And we make all that in this room. Reporter: Walt Disney's vision of peace and joy, still striking the universal chord it did 50 years ago. ? It's a small world after all ? And the big moment has arrived. We have choirs all around the world ready to sing along with us. First, though, we're going to kick things off here in times square, with the wonderful young people's chorus of New York City. So, let's take it away. ? It's a world of laughter a world of tears ? ? it's a world of hopes and a world of fears ? ? there's so much that we share that it's time we're aware ? ? it's a small world after all ? ? it's a small world after all it's a small world after all ? ? it's a small world after all it's a small, small world ? ? there is just one moon and one golden sun ? ? and a smile means friendship to everyone ? ? through the mountains divide and the oceans are wide ? ? it's a small world after all ? ? it's a small world after all it's a small world after all ? ? it's a small world after all it's a small, small world ? ? There's so much that we share that it's time we're aware ? ? it's a small world after all ? ? it's a small world after all it's a small world after all ? ? it's a small world after all it's a small, small world ? ? Though the mountains divide and the oceans are wide ? ? it's a small world after all ? ? it's a small world after all it's a small world after all ? ? it's a small world after all it's a small, small world ? ? it's a world of laughter a world of tears ? ? it's a world of hopes and a world of fears ? ? there's so much that we share that it's time we're aware ? ? it's a small world after all ? ? it's a small world after all it's a small world after all ? ? it's a small world after all it's a small, small world ? ? it's a small world after all it's a small, small world ? Just incredible. Good morning, America, from the international space station. It really is a small, small world. Well, so, you can feel the global -- nasa astronauts, Rick. He is aboard the international space station since November 2013. Thank you, Rick. And thank you to the young people's chorus. It is a small world after all, right? Thank you. You guys sounded great. We want to thank everybody for taking part of this. It was amazing. It came to life because of you. Go to goodmorningamerica.com at Yahoo! To find out more about how you can celebrate "It's a small world" by uploading your version of the song.

This transcript has been automatically generated and may not be 100% accurate.

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