Fearne spoke on Nick Grimshaw’s radio breakfast show about how Lily reportedly ‘blanked’ her at the glitzy awards do.
She said that 28-year-old Lily apparently avoided her ‘5 times’ at the awards show.
Fearne told Grimmy: ‘So I thought, Oh, I'll say hi at the Brits… she looked through me like a pane of glass.’
The star, who is engaged to Ronnie Wood’s son Jesse, continued: ‘She blanked Jesse. You know my boyfriend is the nicest guy in the world... blanked.’
32-year-old Fearne was at the Brits presenting an award with rapper Tinie Tempah.
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Singer Lily, who presented at the awards, caught wind of Fearne’s comments and took to Twitter to tell her side of the story.
She wrote: ‘I did not blank you. That is simply not true. I didn't see you or your husband.’
The star continued firing back: ‘Why couldn't you just come over a say hi yourself?’
Fearne previously said in her radio show back in October 2012 that she thought Lily wasn’t keen on her, saying: ‘I've got no beef with her at all. I've met her like, once, but she doesn't like. I literally do not know why.’
Fearne is yet to respond to Lily’s tweets- but could this be another Twitter feud gathering momentum?