Peter Mann, Jaden's father also wrote on Facebook: "This means more to us than all the wonderful things people have done this week. when your daughter asks after her 2nd operation is Ariana OK?"
"All the children and parents were so happy she came", Lauren Thorpe, whose daughter is in the hospital, told CNN. "Never seen jaden so happy!even cried again myself".
The May 22 suicide bombing outside the Manchester Arena killed 22 people and injured dozens more, including children. All proceeds from the June 4th concert will go toward the "We Love Manchester Emergency Fund", in partnership with the British Red Cross and the Manchester City Council.
Grande is scheduled to perform a benefit concert in Manchester on Sunday.
London mayor Khan condemns attacks
Six people have been killed and at least 20 injured in the attack that comes just days ahead of the United Kingdom elections. Emergency officials said 48 people were treated at London hospitals and a number of others suffered less serious injuries.
The 23-year-old pop singer will be the main performer at a benefit concert on Sunday at the Old Trafford Cricket Ground, a Manchester cricket ground near Manchester's soccer stadium United.
Meanwhile, Karen Mills said her injured daughter Evie, 14, was "buzzing" from meeting the "lovely, adorable and humble" star, who she said gave the girl "half an hour of pure happiness".
Police investigating the Manchester Arena suicide bombing have arrested a 24-year-old man after seizing a vehicle deemed significant to the investigation. Eleven people are in police custody as part of the police investigation into the attack. Grande is set to play a tribute gig in Manchester this evening along artists including Coldplay, Robbie Williams and Take That. The youngest victim of the attack was just eight years old.
Though attendees of Grande's original May 22 concert were told they'd be offered free passes to the benefit show, many fans hoping to attend took to social media saying that they were unable to obtain tickets.