It will air from 6.55pm BST to 10pm BST on Sunday June 4.
The May 22nd attack at Manchester Arena killed 22 people and injured dozens of others, many of them teenagers.
Fan Lily Harrison, eight, "felt like a rock star" after meeting her idol Grande on Friday at the Royal Manchester Children's Hospital on Friday.
Lauren Thorpe, the mother of 8-year-old Lily Harrison, tweeted a picture of the pair hugging, writing: "Tonight's visit from @ArianaGrande was fantastic".
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"It was (a) tough realisation that we thought we may have lost her", he shared.
Jaden Farrell Mann, a young Manchester survivor, tweeted pictures of the pop star along with the message "I got to meet my queen today".
"We were the last room on the ward that she came to visit, so I think the excitement was building and building, and then she came skipping in".
The singer also took selfies with just about everyone including the hospital staff, and even took the time to chat on FaceTime with other fans that were at the original Manchester show.
Ariana Grande visitou Hoje fãs que ainda estão no hospital por causa do atentado de Manchester!
Ariana Grande was spotted at Stansted Airport on Friday with her parents and boyfriend, Mac Miller. Anushka managed to get only two tickets for the show.Anushka's mother, Sharmila Gupta said she is amazed to see the spirit of the 17-year-old girls who will be attending the show.