The ‘Hello’ singer dedicated the track ‘Make You Feel My Love’ to the victims during her performance in Auckland’s Mount Smart stadium.
She told 40,000 fans on Wednesday night: ‘Today there was a terror attack in my hometown of London.
‘I’m literally on the other side of the world and I want them to see our lights and to hear us.’
She added: ‘It’s very strange not being home, all I want to do today is be at home with my friends and family.
‘All of them are fine but there are four people who aren’t fine so let’s dedicate this to them tonight, and to my hometown, which is my soulmate. This is ‘Make You Feel My Love’.’
Teacher Aysha Frade, US tourist Kurt Cochran and an unnamed 75-year-old man were killed after Khalid Masood drove his Hyundai into pedestrians on Westminster Bridge.
The 52-year-old then stabbed unarmed PC Keith Palmer to death at the gates to the Houses of Parliament.
Dozens of other people were injured during the attack, including nationals of Britain, France, Romania, South Korea, Greece, Germany, Poland, Ireland, China, Italy and the US.
Masood was shot dead by police at the scene.