Christine Teigen arrives at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
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Katy Perry arrives at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
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Christine Teigen, left, and John Legend arrive at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
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Katy Perry arrives at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
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Katy Perry arrives at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
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Katy Perry arrives at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
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John Legend performs at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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Alicia Keys, left, and John Legend perform at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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LL Cool J speaks on stage at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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Katy Perry performs at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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Katy Perry performs at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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Katy Perry performs at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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Katy Perry performs at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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Katy Perry performs at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Zach Cordner/Invision/AP)
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Christine Teigen, left, and John Legend arrive at the night that changed America: a Grammy salute to the Beatles, on Monday, Jan. 27, 2014, in Los Angeles. (Photo by Richard Shotwell/Invision/AP)
