The Grammy Awards nomination party is set to be a pop spectacular! Katy Perry and Justin Bieber have signed up to perform at the event.
The pop pair will hit the stage at the Grammy Nominations Concert Live!! – Countdown To Music's Biggest Night event on December 1. Country star Miranda Lambert, Bruno Mars and rapper B.o.B will also perform.
LL Cool J will host the one-hour special for a second year. The actual Grammys will take place in Los Angeles on February 13.
(Photos: AFP/Getty Images/Wireimage)