In 2007, the inmates of Cebu Provincial Detention and Rehabilitation Center in the Philippines became famous after a video of them performing Michael Jackson's Thriller went viral.
To date, that video has attracted over 50 million views.
Since then the prison's dance troupe have performed choreographed dance routines to other popular songs such as the Village People's Y.M.C.A.
The prisoners have now taken on South Korea rapper Psy's Gangnam Style, which is currently number one in the UK charts.
Its music video is the most watched YouTube video of 2012, with over 353million views to date.
Around 1,000 prisoners are said to have taken part in the performance.