For weeks “America’s Got Talent” fans have suspected that Rob Lake is able to pull off all of his magic acts because he has a twin brother, but during Tuesday’s Quarterfinals 3 episode he denied those rumors. “I don’t,” the magician told host Tyra Banks and judges Simon Cowell, Heidi Klum, Mel B and Howie Mandel. “I have one sister. She’s here tonight and she hates magic.” Watch Rob’s “Americas Got Talent” performance video above in which he disappears from a motorcycle and then reappears in the audience. Then be sure to read the judges’ comments below and make your predictions for which seven acts will advance to the Semifinals.

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Simon: “I feel I’ve kind of helped you come to this place. I think you put...