Over a month has gone by since Tomorrowland had its first big line-up announcement, and more and more artists are trickling in. The difference between Weeks 1 and 2 seems to be growing wider, with Week 1 having more of the exclusive artists so far. These include Afrojack, Dirty South, Dada Life ,Pretty lights, Richie Hawtin and New World Punx for week 1. On the other hand week 2 gets the trance legends Above & Beyond. It also has to be emphasized that it's still early days, and the vast majority of the line-up has not been announced yet, so don't despair if you are feeling disappointed!
A clever clog realised that if you put in the name of an artist who will be playing, even if they were not announced yet, in the Tomorrowland page you would get an 'access denied' message, while if they were not playing you would get a normal 404 error page. The loophole has been closed but artists who got access denied pages (implying that they will be announced) include: Skrillex, Showtek, R3hab, Avicii, Knife-party, Regi, Coone, Chuckie, Glowinthedark, Nervo and Kaskade.
Take this information with a grain of salt, but maybe they are onto something!