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.]
The Muse mommy had just left a London dinner with Matt Bellamy when she flashed us those white knickers.
It could have been worse, though. At least she WAS wearing panties!
[Image via Pacific Coast News.]