Ahead of performing at Radio One’s Big Weekend festival this Saturday, the US popstar appeared at a small gig for her fans at The Water Rats pub and urged the crowd to “not let terrorists win”.
The Firework singer also dedicated a song to the 22 people who were killed when a suicide bomber detonated a device at the end of Ariana Grande’s concert at the Manchester Arena.
An emotional Katy said to her adoring fans: “This week has been really hard. It sucked. It was hard for you guys and it was hard for me because we all love music.
“We all listen to the same music. And you think about it and you think that’s my friend, that’s my sister, that’s my brother, that’s my cousin, that’s the person that loves music. It’s awful.
“And whatever you can do to help, you should. And if you can’t do anything that’s fine. But what you should do is not let them win.”
Before belting out her 2012 hit Part of Me, she said: “I’m going to sing this next song for them. They can never take that part away from us ever. Ever. Ever.”
Katy then asked the crowd for a moment of silence before she carried on with her show-stopping performance.
The 32-year-old joins a long list of celebrities who have paid tribute to the victims of the horrific act that happened earlier this week.
Former One Direction star Harry Styles told his fans in Mexico that the tragedy in his hometown had “left a hole in my heart” before he held a one minute’s silence.
He told the crowd: “We have a choice, every single day that we wake up, of what we can put into the world, and I ask you to please choose love every single day.”
In addition, Celine Dion also honoured the victims with a powerful tribute as she asked her audience to hold hands for a moment of silence.
At her Las Vegas residency at Caesars Palace, the My Heart Will Go On singer said to her fans: “Come on, everybody, stand up, and you know what, raise your hands and join them to the person on either side of you,…