Pukkelpop is an annual music festival which takes place near the city of Hasselt, Belgium. It is one of the largest music festivals in the country, with an attendance of approximately 130,000 in 2007. The festival began in 1985 and has expanded steadily over the course of its inception. Originally a one-day event, the festival has since grown to a three day event and features over 150 acts. It was founded and still organized by the Humanistic Youth of Leopoldsburg, which is led by politician Chokri Mahassine.