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Madonna talks about Lady Gaga's "obsession" with her, and Gaga calls copycat claims "ridiculous".
The war began when comparisons were made between Gaga's 'Born This Way' and Madonna's 'Express Yourself'.
"What a completely ridiculous thing to even question me about," the Metro report Lady Gaga fuming in a previous interview.
"If you put the songs next to each other, side by side, the only similarities are the chord progression.
"It's the same one that's been in disco music for the last 50 years!"
But the war is back on, as when Madonna was quizzed about Lady Gaga at the Venice film festival she called the 'Judas' singer "obsessed".
"As for Lady Gaga, I have no comment on her obsessions related to me," Belgian paper LeSoir quote.
"I do not know if it is based on something profound or superficial."
Lady Gaga's new single 'You And I' is out to download on Sunday 18th September, with a new album and tour announcement expected later this year.