Callander, 18, who is being described as a "super fan" of Ariana Grande, was killed along with 21 others in a bomb attack Monday night (May 22) after Grande's sold out concert for her "Dangerous Woman Tour" at the Manchester Arena.
At least 22 people are dead and dozens more are injured after a suicide bomber detonated an explosive in the moments following an Ariana Grande concert at the Manchester Arena in England. Here are some things you need to know.