Technical faults and an overloaded ticketing system have forced organisers of the Big Day Out festival to hold a second Sydney show.
The tickets went on sale online at 9am today but sold out instantly with many unable to secure tickets despite refreshing the website.
Early tickets were sold by Ticketmaster at 9pm last night. An estimated 50,000 tickets have been listed on eBay at double the price.
Big Day Out organisers also sold tickets via its site last night, however technical errors prevented sales being processed.
According to Big Day Out national event coordinator Sahara Shepherd, Ticketmaster sold the tickets early due to an "internal error".
She told the Sydney Morning Herald that scalping was unavoidable and a second show was necessary to meet the increased demand.
The second festival will be held on Saturday January 23rd 2010 and tickets will go on sale Monday 12 October 2009.
Organisers claim that is the second time in the festivals 18-year history it has had a second show and coincides as the 100th Big Day Out festival.
In a joint statement, organisers Ken West and Vivian Lees said the overwhelming demand for tickets shows that fans are supporting the festival more than ever.