Demi Lovato tweets about singing "Sorry Not Sorry" to internet bully and he responds

Demi Lovato tweeted about being able to sing "Sorry Not Sorry" to "one of USA's most notorious bullies. Fans easily figured out who she was talking about.

He posted a video on Twitter about it where he says she was saying things that weren't supposed to make him feel good so she seems like the bully. He then goes on to say she has a lot of issues because he's unable to stop himself from being an awful human being for even a single minute:
"Demi Lovato has a lot of issues. From her bipolar issue, to her addiction issue, substance abuse, to her food issues, to her place in Hollywood. "She's not Taylor Swift. She's not Selena Gomez. And it must not be easy for her."