While Grande was unharmed in the attack - she left the stage just before the explosion - a source close to her told TMZ the singer was "in hysterics" and "in no condition to perform" at her upcoming concerts.
But fans and others rallied around Grande and her fans at the Manchester show to show solidarity with the 23-year-old singer, who is reportedly physically OK, starting the hashtag #ThisIsNotYourFaultAriana. Some of the dead were children, but Hopkins provided no further details about the victims or the attacker.
Local police in Manchester also tweeted that a second person was arrested early this morning in connection to the bombing.
British Prime Minister Teresa May says authorities are treating the incident "as an appalling terrorist attack". "L$3 ove love love you... so sorry you had to be apart of such a tragic event! my most honest condolences to anyone and everyone affected by this horrific attack!" "From the bottom of my heart, i am so so sorry. i don't have words".
"The two leaders agreed that this attack - which targeted teenage children and their friends at a joyous event - was particularly wanton and depraved".
"We are shocked and deeply saddened by the bad tragedy in Manchester".
The attack took place at the Manchester Arena shortly after the pop star's concert ended, leaving at least 59 injured in addition to the almost two dozen dead.
"My thoughts and prayers are with everyone in Manchester tonight. and all of those families affected by tonight".
The New Daily has contacted Grande's tour promoter Live Nation for comment but they did not respond.
Videos shared online shows concertgoers, many of them tweens and teens, frantically fleeing a chaotic scene.