Pop singer Aaron Carter and his brother, Backstreet Boy Nick Carter, will be in Manhattan today to help Hasbro launch the new Twister Moves game. At 2 p.m., there's a free concert at the South Street Seaport; at 5 p.m., the duo will sign autographs for the first 800 guests who purchased Twister Moves at the Toys 'R' Us Times Square store.


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