(CNN) Demi Lovato found humor in some memes about 21 Savage, but other people didn't find that so funny.

The singer deactivated her Twitter account Sunday after she was criticized for tweeting, "So far 21 Savage memes have been my favorite part of the Super Bowl."

The rapper was the subject of conversation on social media after he was arrested in Atlanta early Sunday by US Immigration and Customs Enforcement.

He is accused of being a UK citizen who entered the United States legally when he was a minor in July 2005, but he allegedly failed to leave under the terms of his nonimmigrant visa.

Read More