The ‘Part Of Me’ singer’s white dress was adorned with colourful photos of the victims of the Manchester terror attack, which saw 22 people killed at the city’s arena on 22 May.
“It’s not easy to always choose love, is it, especially in moments like these, right?” Perry said.”It can be the most difficult thing to do.
“But love conquers fear and love conquers hate, and this love that you choose will give you strength, and it’s our greatest power.”
When Perry took off her white coat, the images could be seen on her collar, cuffs and across her back in the shape of a heart.
All net ticket proceeds will go towards the We Love Manchester Emergency Fund set up by Manchester City Council in partnership with the British Red Cross.
To donate £5 to the We Love Manchester fund, text LOVE to 70507. Texts cost £5 plus your standard network rate, with 100% of your donation going to the We Love Manchester fund.