Ariana Grande concert: Stars share 'prayers and tears' for victims of Manchester Arena

Katy Perry, Taylor Swift, Demi Lovato and others spoke out.

— -- Celebrities are continuing to react in horror at the news that 22 people, including some children, are dead and 50 others are injured after an explosion rocked the Manchester Arena in England last night.

"Tearing up imagining innocent concert goers losing their lives.. praying for everyone and all #arianators," Lovato added. "My prayers are with you Manchester."

Grande tweeted after the incident that she is "broken. from the bottom of my heart, i am so so sorry. i don't have words." A rep for the singer had told ABC News earlier that she was unharmed in the attack.

Authorities are still investigating the incident and United Kingdom Prime Minister Theresa May on Tuesday morning called the "sickening."