Pictures Grammy Nominations Concert On CBS December 7, 2013 / 5:16 PM CST / CBS News (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: Frederick M. Brown/Getty Images) 2013 Grammy Nominations Concert (credit: ROBYN BECK/AFP/Getty Images) 2013 Grammy Nominations Concert (credit: Frederick M. Brown/Getty Images) 2013 Grammy Nominations Concert (credit: Gabriel Olsen/Getty Images) 2013 Grammy Nominations Concert (credit: Frederick M. Brown/Getty Images) 2013 Grammy Nominations Concert (credit: Gabriel Olsen/Getty Images) 2013 Grammy Nominations Concert (credit: Frederick M. Brown/Getty Images)