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Katy Perry hit the stage at the Grammy Awards Sunday night, performing her new song with a new look!

The singer rocked short crimped blue hair as she sang "Part Of Me" while wearing a skin-tight body suit.

It sounds like Katy took a shot at ex-Russell Brand during the performance too -- singing the lyrics "You can keep your diamond ring, in fact you can keep everything except for me."

Watch that part of the performance below:

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