The 2010 Grammy Nominations Concert
Katy Perry, Bruno Mars, B.o.B. and more


John Shearer/WireImage
Katy Perry performs at the Grammy nominations concert in Los Angeles, December 1, 2010.
Katy Perry, Bruno Mars, B.o.B. and more
John Shearer/WireImage
Katy Perry performs at the Grammy nominations concert in Los Angeles, December 1, 2010.
Rolling Stone is a part of Penske Media Corporation. © 2022 Rolling Stone, LLC. All Rights Reserved.