Well, this is QUITE the accusation.
She shared a clip of the part the hitmaker stole, and called her out in the caption, writing:
[Image via Beyoncé/Marlyn Ortiz/Instagram.]
Smoothie Bruno Mars is unleashing his new music beast and it's gonna chomp up allll the eardrums!
Ch-ch-check out the teaser (above) to get a sense of what Bruno's new tune will be like…
We're sure it'll be just as heart melting as his former hits!
Just… hearts dripping everywhere.