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.]
Lady GaGa gave a brilliantly beautiful, pure performance of You & I on the Jonathan Ross Show!
The stage was designed by GaGaloo herself, and we think her performance was stunning!
Press play and give it a watch URself! Her talent and beauty really shines in this one!!