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Last Updated: Wednesday December 01 2010 16:25 GMT

In pics: Katy Perry shines in Grammy rehearsals!

Katy Perry

It was only a rehearsal - but Katy Perry never misses the chance to bring some glitz and glamour to the party!

Katy Perry

The singer was dressed as a Christmas bauble as she practiced her routine for the Grammy nominations show in America.

Katy Perry

She wore a silver Tutu complete with shiny festive decorations in her hair as she warmed up for her big performance.

Katy Perry

With the Fireworks singer making such an effort for the rehearsals - keep and eye on the Newsround website for what she'll be wearing for her actual performance.

Katy Perry

As well as Katy, the likes of Selena Gomez and man of the moment Justin Bieber will take to the stage and perform at the show tonight.