In the spirit of New Years Eve, What's the biggest yearly party on Earth?

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I live in Southern California about 2 miles from Disneyland. Millions of people flock to where I live just to go there every year. Having seen a picture of one of my new mylot friends attending Octoberfest in Germany, gave me the idea for this post. What do you think is the biggest party of the year on planet Earth. Whether it be Octoberfest in Germany, Carnivale in Rio De Janeiro, Mardi Gra in New Orleans, or perhaps New Years Eve in Time Square. Have you ever been lucky enough to attend such an event, and if so tell us about it.