Willem Rebergen, better known by his stage name Headhunterz, is a Dutch hardstyle DJ and music producer. Beginning his career with duo partner Bobby van Putten under the alias, Nasty D-Tuners, Rebergen and van Putten renamed their act to Headhunterz when they signed for Dutch hardstyle label Scantraxx in 2005. Van Putten left shortly after their first release on Scantraxx and Willem Rebergen took over the Headhunterz alias as a solo act. Headhunterz was one of the biggest names in hardstyle music and has been a major contribution to its growing popularity. He has also been a key figure in the development and musical direction of hardstyle with a large section of his musical releases placing emphasis on trance influenced melodies and distorted, pitched kicks. He has performed at every major hardstyle event including Qlimax, Defqon.1, Q-Base, inQontrol, Decibel and Hard Bass and has performed at popular electronic music festivals Electric Daisy Carnival and Tomorrowland.