Police have warned music fans to be wary of buying gig tickets online because of a rise in fraud.
This year, the UK has seen 3,000 complaints of online fraud, compared to just 600 in 2010.
"Concert tickets are very very popular, people are desperate to see their favourite bands. People get desperate to see them and take risks on other websites," said Steve Profit from Action Fraud which deals with complaints of fraud in the UK.
Steve pleaded for others to report fraud if they've also been affected. "We need to know how many people are victims to this so that police can take action against these websites," he said.
The rise may have been related to the Olympic games, where London was the host for the 2012 event.
Police say they've learned a lot from "Operation Podium" which targeted fraudulent Olympic ticket sellers, and hope those lessons will be applied to the music sector.
Unusually, Action Fraud say they received an even higher 7,000 complaints in 2011, but most of them were linked to one company which has since been shut down.
Have you been affected by ticket fraud? What happened? Let us know in the comments.