Searches for One Direction tickets on ticket resale site Viagogo have rocketed by 287% amid a surge in cut-price resale listings after a video was leaked showing the band's Zahn Malik appearing to smoke cannabis.
By Damon Green: ITV News Correspondent
I've been in Sunderland today ahead of One Direction's show at the Stadium of Light. While I was there, I asked some of their fans - many of whom are young girls - and their parents what they think of that video footage that emerged today.
What's clear from most of the younger contingent is that, as far as they're concerned, the band can do no wrong.
But there is a significant group of other people - the people who fetch these young fans from the concerts, who pay for the tickets - that aren't so forgiving.
If you ask many of the parents, they are far from impressed with what they have seen.
Liam Payne has apologised on behalf of his One Direction bandmates after two of the singers were filmed appearing to be smoking marijuana.
Members of boy band One Direction have been filmed smoking a rolled up cigarette and joking about cannabis.