© Rex Features
Writing on her blog, the Paramore frontwoman revealed the clip - from a track titled 'In The Mourning' - but insisted that fans should not expect to see it on the band's next album as the song was a solo effort.
"A few weeks ago I posted some new lyrics up on Tumblr. Wanted to share the melody with anyone who's asked me to post it (sic)," she explained.
"This is just the chorus... I didn't want to post the full thing yet because I don't want people thinking it's a new Paramore song. This is just something I wrote for fun. Hope you likes!"
Williams recently revealed that Paramore will release new music in 2011.
