Perry, Lorde and Thicke will join previously announced performers Kendrick Lamar, Pink (performing with fun.'s Nate Ruess), and Daft Punk, who's bringing along famous friends Stevie Wonder, Pharrell and Nile Rodgers.
In a special performance, legendary rockers Chicago will be hitting the stage alongside Thicke for what will probably be a jazz fusion-y version of "Blurred Lines" (though we're secretly hoping they'll break out into a little "You're the Inspiration"). This will be Lorde's first time on the Grammy stage and Perry's third.
Metallica will also be on deck for their first Grammys performance since 1991. They'll be hitting the stage with Lang Lang, a Chinese concert pianist who is also the Grammy "Cultural Ambassador" to China. Their Metallica Through the Never soundtrack is nominated for Best Recording Package.
Check out the hottest live shots from the Grammy Nominations Concert below and check the list of all 2014 nominees here. The Grammys air January 26 at 8/7c on CBS.