The singer was included in TIME’s Most Influential list earlier this year.
A representative for TIME has not responded to Lovato’s latest rant via Twitter.
Since 1927, TIME has bestowed its Person of the Year title upon a person or group of people whom its editors believe influenced news and events of the past year—for “better or worse.”
Last month, Trump erroneously claimed he was being considered for the cover. “He’s No. 2 on our list because he’s changed the very nature of the presidency and the way the White House functions,” editor Edward Felsenthal said on Today. “He’s on the verge of his first major legislative victory, he’s reshaping the judiciary and [he’s] aggressively rolling back regulations.”