Armin van Buuren is a Dutch DJ that has been the #1 in the DJ Mag Top 100 for 4 years in a row up to 2010. He has a world famous podcast known as A State of Trance, which can be found on itunes. I've only seen him once, but he gave a spectacular performance that lives up to his name. He recently released his new album "Mirage", which I personally thought was so-so at best (though there some notable tracks in there). If you're into trance at all, you should have heard of Armin before... if not, try listening to one of my favorite songs by him and see if you like him!