Pop star Demi Lovato has criticised Lady GaGa for her vomit-filled performance at the South by Southwest festival in Texas on Thursday (13Mar14), insisting it was insensitive.

Lovato, who has struggled with bulimia for years, claims the Poker Face singer's idea to allow a British artist to throw up all over her glamorises a disease that blights the lives of many young girls.

In an angry tweet on Friday (14Mar14), Lovato, who spent three months in rehab attempting to treat her self-harming issues, wrote, "Sad... As if we didn't have enough people glamorising eat (sic) disorders already.

"Putting the word Art in it isn't a free card to do whatever you want without consequences."