The Poker Face came under fire over her controversial performance at the event in Austin, Texas earlier this month (Mar14), when an artist threw up green and black liquid all over her body.
Lovato, who has battled her own eating disorders in the past, publicly criticised Gaga, accusing her of pushing impressionable young fans towards bulimia.
In a series of posts in Twitter.com, she wrote, "Sad... As if we didn't have enough people glamorising eat disorders already... Putting the word Art in it isn't a free card to do whatever you want without consequences."
Gaga has now responded to Lovato's concerns, insisting she supports the young star in her recovery and didn't mean to address the subject of eating disorders by featuring vomiting in her show.
She tells E! News, "I have struggled with an eating disorder for over 10 years, and I take that very seriously. I take the struggle of others very seriously. I am very supportive of Demi's struggle and her recovery, as well as the recovery of anyone who is suffering from that. But this performance had absolutely nothing to do with any eating disorder, and we never intended for it to be taken that way. I'm really proud of the performance and really stand by the message of rage and pain that we were trying to express in that moment."