Justin Bieber said it best on his Twitter page: "New York. Wild Day."

PHOTOS: Justin Bieber Causes Mob Scene In New York

The 17-year-old heartthrob inadvertently caused a melee in Manhattan during an appearance at Macy's on Thursday, when he was promoting his new fragrance, Someday.

When the international superstar wanted to go outside and greet his adoring public, police said they set up a small area in which he could do so. Bieber wound up walking out of the area, however, and headed towards a barricade that was holding back an estimated 500 fans. As he drew nearer, the barricade came crashing down and a ruckus ensued.

What do you get when Obamamania meets Bieber Fever? One massive mess of gridlock if it occurs in New York City!

It's rare that Barack Obama and Justin Bieber have anything in common but when the pair arrive in New York on Thursday fans on both side will be out in full force.

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The ensuing gridlock is expected to cause absolute chaos in the Big Apple especially in Midtown and the West Side of Manhattan as the two uber famous figures arrive with their massive security entourages.

President Obama is in town to raise funds for his re-election campaign, while Bieber is in the city for an equally important mission - to launch his new fragrance, Someday, at Macy's Herald Square.