Valerie Simpson, left, Usher, center, and Mike Stoller perform during a salute to Nick Ashford and Jerry Leiber at the Grammy Nominations Concert on Wednesday, Nov. 30, 2011 in Los Angeles. (AP ... more 
Valerie Simpson, left, Usher, center, and Mike Stoller perform during a salute to Nick Ashford and Jerry Leiber at the Grammy Nominations Concert on Wednesday, Nov. 30, 2011 in Los Angeles. (AP Photo/Matt Sayles) less 
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Associated Press | Photo By Matt Sayles
Wed, Nov 30, 2011 11:47 PM EST