In the wake of Monday night’s horrific & senseless terrorist attack at Manchester Arena in England, where 19 people lost their lives & many more injured, pop-singer Ariana Grande has reportedly cancelled the remaining dates on her World Tour TMZ has learned.

TMZ reported that Ariana was "in hysterics" after the bombing, and understandably so. One source said, she's incapable of performing for anyone right now, hence why she's putting it on hold. She even just broke her silence & just tweeted out the following…"broken.  from the bottom of my heart, i am so so sorry. i don't have words.”

Ariana's manager, Scooter Braun, said, "We mourn the lives of children and loved ones taken by this cowardly act," adding, "We ask all of you to hold the victims, their families, and all those affected in your hearts and prayers.”

We'll continue to keep you updated. Prayers for Manchester.