Katy Perry made a sick fan’s day when she turned up unannounced to play a gig in her living room.
Eight-year-old Grace Moores, who had recently undergone surgery for a brain tumour, thought she was going to have to miss the concert.
She was diagnosed with a brain tumour in April.
The Australian KatyCat, who has been a Perry fan since she was three, had been given the tickets for her birthday more than a year ago.
RETWEET PLEASE! my baby sister is meant to attend @katyperry concert in Adelaide this year but was diagnosed with a 6cm Brain tumour and has been battling all year, grace has love been Katy’s biggest fan since she was 3, please help us try and get in contact with @katyperry xx pic.twitter.com/5C9Xuccmu4
— Tiana is trash (@tianamoores_) July 25, 2018
However, a social media campaign started by Grace’s older sister Tiana – using the hashtag #helpGracemeetKatyPerry – brought the young fan’s plight to the popstar’s attention.
The original post received more than 21,000 retweets.
Perry, 33, posted a video of her visit, during which she performed her hit song Firework at Grace’s flat in Adelaide, titling it “The Power Of The Internet”.
She told fans: “Today is one of those days when I actually feel like a unicorn. That’s because I get to use my powers for good.
“I’m going to meet someone called Grace who wasn’t able to come to the show. And so I just figured… we’d bring the show to her.”
In the video, Grace’s sister also shows her own closely cropped hair, which she shaved to raise $2,100 Australian dollars (£1,184) for her sibling.