A video of scantily-clad women dancing in Amsterdam's red-light district has gone viral as part of a campaign against human trafficking.
It has been viewed more than two million times on YouTube and shows six female "sex workers" strutting in the windows of a brothel before they break into a choreographed dubstep dance routine.
As pounding electronic music blares from the brothel, a crowd gathers out the front to watch the flash-mob style show.
When the dance routine ends, they clap and cheer and a message appears on a screen above the brothel:
"Every year, thousands of women are promised a dance career in Western Europe. Sadly, they end up here. Stop the traffik. People shouldn't be bought or sold.”
The short video is part of a campaign by Stop The Traffik, an international anti-slavery organisation that aims to stop human trafficking and prosecute traffickers.
Stop the Traffik has more than 1000 members, including in Australia.
Dutch advertising agency Duval Guillaume Modem created the ad in the hope of raising awareness of human trafficking.
"With this campaign, Stop The Traffik wants to make people aware that a lot of these girls are victims of human trafficking and end up in prostitution against their will," the agency said.