Update: Ariana has tweeted.
Grande's manager, Scooter Braun, had this to say:
The pop star is grieving with the rest of the world following reports that at least 22 people were killed and 59 were injured at her Dangerous Woman show.
Sources connected to the singer are telling TMZ she is "in hysterics" after learning about the tragedy and will likely postpone her concert at the O2 Arena on Thursday for several reasons.
Per TMZ, "it may constitute a safety threat," and also, as their source put it, "She's in no condition to perform."
Singers including Cher, Katy Perry, Demi Lovato, Fifth Harmony, Halsey, Harry Styles and many more are weighing in. Read their messages here.
Ariana Grande is understandably devastated following the attack at her concert inside the Manchester Arena on Monday.UPDATE: Hours after what police suspect was a terrorist attack at Ariana Grande's concert at the Manchester Arena, the pop star broke her silence. "Broken," she wrote. "from the bottom of my heart, i am so so sorry. i don't have words."
broken.— Ariana Grande (@ArianaGrande) May 23, 2017
from the bottom of my heart, i am so so sorry. i don't have words.