Madonna's time at the Venice Film Festival has been riddled with controversy!

First, her movie got panned by critics, then she rejected gifts from fans and now she's dissing pop's reigning princess -- Lady Gaga!

In Venice, Madge told French newspaper LeSoir:

    "As for Lady Gaga, I have no comment on her obsessions related to me, because I do not know if it is based on something profound or superficial."

Gaga's music has drawn major comparisons to Madonna -- many accused her of copying Madge's "Express Yourself" with "Born This Way."

But Gaga says she's just a fan. She told Jay Leno in February, "There is really no one that is a more adoring and loving Madonna fan than me. I am the hugest fan personally and professionally."