She wrote on Instagram: ''When your derp squad writes a Christmas song in August.''
The 'Dark Horse' hitmaker previously alluded she may be working on a holiday hit when she tweeted about an incident in the studio which ended with her falling flat on her face, ending the message with Christmas tree, prayer and musical notes emojis.
She wrote: ''Ya know yer sanging good when ya lose yer balance & fall over in the vocal booth.''
Katy - who released her fourth studio album 'Prism' in 2013 - has not confirmed when she will release the project, although if she puts it out this year it will coincide with H&M's Christmas campaign, which she previously revealed she will be the face of.
Other musicians set to put out new seasonal tunes this Christmas include Mariah Carey who is re-working her 'Merry Christmas' collection, and Kylie Minogue who is rumoured to be creating a disco-inspired record.
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