Rihanna and Usher Added to the Grammy Nomination Concert

The Grammy Nominations Concert Live!! – Countdown to Music’s Biggest Night, hosted by LL Cool J, has just added three acts to the lineup. Rihanna, Usher, and The Band Perry will perform on the 1-hour special taking place on November 30, 2011 at Nokia Theatre L.A. Live.
 
Artists previously confirmed to perform include Jason Aldean, Lady Gaga, Ludacris, Lupe Fiasco, and Sugarland.
 
The Grammy special will air on CBS from 10-11pm ET/PT.
 
In addition to the announcement of nominees in several categories, an iconic group will announce their reunion which will take place on the Grammy stage on February 12, 2012.
 
Source: The Recording Academy