Ariana Grande arrived in the U.K. on Friday, ahead of the One Love Manchester Benefit Concert to be held at the Old Trafford cricket grounds on Sunday. She spent the day surprising some of her young fans – victims of the incident – with a surprise visit at the Royal Manchester Children’s Hospital.

The One Love Manchester benefit concert will see Grande back on the stage along with several other popular artists, including Katy Perry, Justin Bieber, Miley Cyrus, Coldplay, Usher, Niall Horan, Take That and Pharrell Williams.

The benefit concert is aimed at raising funds for the victims of the suicide bomb attack at her concert on April 22 in the Manchester Arena.

Children the happiest they have ever been after Grande’s visit

Grande’s hospital visit thrilled her young fans, with some of their parents saying it was the happiest they had ever seen their children. Images of Grande with her delighted fans were posted on the @1lovemanchester Twitter page.

According to one tweet, Grande even Facetimed some of her fans and their families. She also took gifts for the young fans including her own merchandise and visited with the hospital staff and nurses while in the hospital.

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According to a report by the BBC, one parent, Peter Mann, whose daughter Jaden was in hospital following the attack, wrote that the visit meant more to them than any of the amazing things people have done for them over the week. He said he has never seen Jaden that happy before and that he even cried himself.

Proceeds from the One Love Manchester benefit concert are set to be heading to the We Love Manchester fund, set up by the Red Cross. One Love Manchester also tweeted that Grande’s music label, Universal Music Group, will donate $500,000 towards the fund.

Opportunists try to get free tickets meant for the victims

In the rather more negative news, Blasting News reported yesterday on a scandal surrounding the free tickets, on offer to the 14,200 people who had attended the original Manchester Arena concert.

Opportunists had been trying to claim free tickets online, saying they had been at the concert. According to Ticketmaster, more than 25,000 people were claiming free tickets, which meant more than 10,000 of them had tried to make false claims.

Manchester Arena attack killed 22 and injured 116 people including children

The suicide bomber, 22-year-old Salman Abedi, detonated an improvised, nail-filled explosive device outside the arena in Manchester, shortly after Grande finished her show. 14,000 fans were in the arena, with 22 people killed and 116 injured in the attack. ISIS later took responsibility for the bombing. The New York Daily News reports that Manchester police have arrested 10 people relating to the suicide bombing.