Lady Gaga will return to Sydney for a one-off show transforming the Town Hall into the ‘Monster Hall’ on July 13.

But tickets will not be available to purchase. Entry into the concert will be reserved exclusively for those who win 2DayFM’s special Gaga contest.

The unique promotion, which begins on June 8 via 2DayFM’s Facebook page, means Gaga fans will have to “upload one single image that best personifies just how monster they are” for the chance to win their place at the event.

To launch the contest, Lady Gaga will be speaking to 2DayFM’s Kyle and Jackie O live on their morning show tomorrow (Monday 30th May).

Those who miss out on the one-off Sydney concert won’t have to wait long for Gaga’s next Aussie dates – she’s hinted she’ll be here on an extended tour later in 2011.

Her global manager said earlier this month about Australia: “We’ll be there in July to promote the album. Then we’re back out that way… well… it’ll be a surprise.”