The 'X Factor' boss was angry when the 'Smile' hitmaker criticised the early release of Mark Ronson and Bruno Mars' new single, Uptown Funk, after it was performed on the UK reality show by contestant Fleur East.
Ronson's single has already raced to the top of the iTunes chart following the early release and Allen has sent a series of tweets, which she later deleted, slamming the move.
During East's performance, Allen tweeted, "Well done to Sony for managing to get a not yet released song of theirs sung on prime time weekend telly. It is an amazing song. Fleur did it justice but it's still a great example of music industry corruption."
"Lily should stop bleating on about all this. Fleur needed this break, got a chance, she totally killed it. Why not be happy for another artist and say congratulations instead of thinking of some stupid conspiracy theory.
"The irony is I spoke to Lily about being a judge. And from what I took from the meeting, she was seriously considering it. Thank God I said no. She'd be a barrel of laughs. Let me tell you the real story. Someone I work with asked, 'Have you heard this song?' I said no.
