Lorde is wielding her star power to thwart scalpers ripping off fans.
The 17-year-old Grammy winner has announced a ticketing system in which only people "invited" to her show can purchase tickets and attend.
The online scheme - called Invitation Onsale - was launched this week to stop scalpers buying lots of tickets and on-selling them for high prices to genuine fans.
Lorde is touring North America over the next few months.
Similar ticket schemes have been used by Mumford & Sons and Ed Sheeran.