By Breaking Celebrity News Staff

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.

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.

According to New York Daily News columnist Gridlock Sam, the President will touch down at Kennedy Airport at 5 pm and then wine and dine with Wall Street donors at the Upper East Side restaurant Daniels.