Katy Perry has pulled out of what would have been her first public appearance since splitting from husband Russell Brand.

The 27-year-old singer took to her Twitter page to tell fans that she will not be attending an award ceremony this Wednesday as she had been scheduled to.

Russell filed for divorce from the Firework singer less than two weeks ago after just 14 months of marriage.

"Unfortunately I will not be able to attend the People's Choice Awards," Katy wrote on the social networking site but did not elaborate on a reason.

"I want to thank u all for voting for me, fingers crossed!"

Katy is nominated for six awards which is more than anyone else. She is up for Favourite Female Artist and Favourite Song for the track E.T. featuring Kanye West.

It was reported last week that Russell had been uninvited from the show to prevent them bumping into each other.

Katy spoke out over the weekend for the first time since her divorce was announced, saying her heart is "happy again."

"I am so grateful for all the love and support I've had from people around the world," she wrote on Saturday. "You guys have made my heart happy again."

Katy went on to urge her fans to ignore speculation surrounding the breakdown of her marriage.

"Concerning the gossip, I want to be clear that NO ONE speaks for me," she tweeted. "Not a blog, magazine, 'close sources' or my family.