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Katy Perry and Justin Bieber will perform at a show to announce the Grammy nominations, organizers for the top music awards said on Wednesday.
The 16-year-old Bieber and Perry, whose song "California Gurls" has been among the top U.S. pop hits of the year, will be joined on stage by country singer Miranda Lambert, rapper B.o.B and singer-songwriter Bruno Mars. B.o.B and Mars collaborated together this year for the single, "Nothin' On You."
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