The Britain's Got Talent superstar will make her long-awaited U.S. debut on the show's American counterpart during its September 16 finale. Boyle's seamstress confirmed the news to People: "It's going to be sensational, really wow. But it's obviously under wraps." Smart money is on Boyle reprising her "I Dreamed a Dream" performance, but there is an off chance she'll go for shock value by covering Madonna's "You'll See." Boyle handpicked the tune for her upcoming I Dreamed a Dream album, which has already topped Amazon pre-order charts. [People]