The "Skyscraper" singer took to her Twitter on Friday to blast Gaga over her "artistic" antics, which also come on the heels of the pop star's appearance on Thursday's "Jimmy Kimmel Live" when she told the talk show host she was "fat".
Demi's publicly struggled with an eating disorder in the past, so we can see why the "Art Pop" singer's performance antics struck a chord with Lovato.
Check out Demi's tweets below -- think she's being too critical of the pop star's performance?
Sad... As if we didn't have enough people glamorizing eat disorders already. 😣 Bottom line, it's not "cool" or "artsy" at all.