John O'Callaghan
1) John O'Callaghan is an Irish DJ, mainly producing electronic music. He also produces music under the alias of <a href="http://www.last.fm/music/Joint+Operations+Centre" class="bbcode_artist">Joint Operations Centre</a>, <a href="http://www.last.fm/music/Mannix" class="bbcode_artist">Mannix</a> and <a href="http://www.last.fm/music/Stenna" class="bbcode_artist">Stenna</a>. He has also collaborated with fellow Discover artists such as <a href="http://www.last.fm/music/Bryan+Kearney" class="bbcode_artist">Bryan Kearney</a>, <a href="http://www.last.fm/music/Neal+Scarborough" class="bbcode_artist">Neal Scarborough</a> (as Inertia), <a href="http://www.last.fm/music/Thomas+Bronzwaer" class="bbcode_artist">Thomas Bronzwaer</a> (as Lost World) and <a href="http://www.last.fm/music/Greg+Downey" class="bbcode_artist">Greg Downey</a>. His best known track is Big Sky, done with vocalist Audrey Gallagher, formerly of the 90's alt-rock band Scheer.