Katy Perry has revealed her excitement ahead of P!nk's performance at this year's Grammys.

The US star is due to perform alongside 'Just Give Me A Reason' collaborator Nate Ruess at the awards ceremony in Los Angeles on January 26.

It seems Perry, who is also on the bill, is keen on checking out the performance after posting about P!nk on Twitter.

Their conversation started when P!nk tweeted a photo of two Cover Girl billboards next to each other - one of herself, and one of Perry.

She said: "Hey! Look at us!!! Nice to be watching over traffic with you."

Perry replied: "Oh hay twin! @Pink excited to see your pretty @COVERGIRL face perform at the @TheGRAMMYs."

Other performers due to take to the stage at the Grammys meanwhile include Taylor Swift, Daft Punk, Stevie Wonder and Metallica.