The 23-year-old singer is currently in Boca Raton, Florida, with family and her boyfriend, rapper Mac Miller
, and a source tells ET that Grande is now trying to make sense of the tragedy in Manchester. Not surprisingly, Grande is devastated.
"She's an emotional mess," the source says. "Children died at her concert. She can't process that. She goes from being very quiet to crying hysterically."
"Her mom, who helped fans escape, is staying by her side," the source adds. "Right now, she's in no condition to even talk about her next performance."
Grande's tour family has also been affected permanently.
"Her entire crew is struggling to process this," the source says. "It was a very scary, life-changing experience.”
"Her team is continuing to assess the situation before they decide how to move forward, " the source said, adding, "their focus is on the victims and their families."
"Broken," she wrote. "From the bottom of my heart, I am so, so sorry. I don't have words."