Sugarland will perform on tonight's 'Grammy Nominations Concert Live,' at 8:00 PM ET on CBS. This photo was taken Tuesday at rehearsals, as the duo prepped for the show outside of Los Angeles' Club Nokia theater. Tonight's show, hosted by LL Cool J, will feature star-studded performances plus announcements of this year's Grammy nominees. The 52nd Annual Grammy Awards will air Jan. 31 on CBS.


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