Crowd procedures will be reviewed after fans said they were crushed and feared for their lives at last week's Coldplay concert.
About 40,000 people packed into the Auckland Council-run Mt Smart Stadium last Saturday.
People who had queued outside for hours to ensure a prime spot said they were trampled in the rush when the doors opened.
"I expected a properly managed route to the arena but instead the gates suddenly opened and a security guy told everyone to 'go for it'," said Justin Susans, 19, a student at the University of Auckland.
"Thousands of people started pouring through a small gate and in the charge some people fell over and there was a lot of pushing. It was like a mad stampede.