So much so in fact, that she's stripped to her undercrackers and posed for a series of snaps to prove that she isn't fat.
Yep, nothing to see here (ahem).
The star was on the receiving end of fat jibes after she appeared on stage in Amsterdam last week looking a little curvier than usual.
And now she's issued an official statement on GagaDaily.com thanking fans for their support and revealing that her boyfriend, Taylor Kinney, prefers her curvy.
You tell 'em, Gaga.