The star has featured on B.o.B's 'Airplanes' and guest performed with US trio fun. during her band's three-year hiatus, but insisted she has no ambitions to start a solo side project.
"No, not one bit," Williams told BBC Newsbeat when asked about the prospect. "Definitely no solo stuff in the works. Even if it had crossed my mind there was no time."
She added: "Number one - we took a little break and then we were onto writing this album.
"I am definitely more in love with this band than I've ever been before which, if you know me, that's kind of impossible. I'm the number one Paramore fan in the world - it's kind of annoying, really."
Paramore will release their self-titled fourth studio album in the UK on April 8 and a day later in the US.
It will be preceded by lead single 'Now', which is available to download in the US and will be released in the UK on February 24.
Listen to Paramore's new single 'Now' below: