LAKE BUENA VISTA, Fla. -

Anyone who has been to a Disney park has heard the song, "It's a Small World."

The timeless Disney tune that wafts through our memories from past theme park vacations turns 50 this year.

On Thursday, Disney parks worldwide will host a global sing-along.

At Walt Disney World Resort in Florida, a huge chorus of the song will be performed Thursday morning in front of Cinderella Castle at Magic Kingdom. It will be broadcast on Good Morning America. Tributes to the song will also be held throughout the park all day.

The song and animatronic attraction debuted at the 1964 New York World's Fair. It was shipped to Disneyland in California then recreated at the other Disney parks. The attraction opened at the Florida park in 1971.