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This will be the 'Teenage Dream' singer's first major U.S. awards show appearance following her split with husband Russell Brand. Perry was scheduled to appear at the 2012 People's Choice Awards, but canceled just days before.
It will also be a big night for Adele, who is performing live for the first time since her vocal chord surgery last fall. The British singer is up for six nominations this year, including Album of the Year for '21' and Song of the Year for 'Rolling in the Deep.' She'll go head-to-head with Katy in the Record of the Year and Best Pop Solo Performance categories, as well.
Also performing at the 54th Annual Grammy Awards are Taylor Swift, Nicki Minaj, Bruno Mars, Jason Aldean and Kelly Clarkson, and Foo Fighters. You can catch all of the performances when the show airs live on Sunday, February 12 at 8PM ET on CBS.