Tomorrowland is a Belgian

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

 outdoor dancing event (festival) organised every year in the Flemish

Flanders

Flanders is the community of the Flemings but also one of the institutions in Belgium, and a geographical region located in parts of present-day Belgium, France and the Netherlands. "Flanders" can also refer to the northern part of Belgium that contains Brussels, Bruges, Ghent and Antwerp...

 town of Boom since 2005. The first names that showed up were Push (M.I.K.E.)

Mike Dierickx

Mike Dierickx , formerly known as Dirk Dierickx, and most commonly recognized under the aliases M.I.K.E., Push or Plastic Boy, is a Belgian DJ. Best known for the song "Universal Nation", he has also released other singles including "The Legacy" and "Strange World"...

, Armin Van Buuren, Cor Fijneman, Yves Deruyter, Technoboy and Coone in that year.

The latest event was the seventh edition of the festival which was held between July 22nd and 24th, 2011, including Afrojack

Afrojack

Nick van de Wall, born 9 September 1987, commonly known by his stage name Afrojack, is a Grammy Award winning Dutch music producer and DJ. Born and raised in Spijkenisse, Netherlands, He was listed as number 7 on DJ Mags top 100 DJs of 2011...

, Above & Beyond

Above & Beyond (band)

Above & Beyond are a British trance music group formed in 2000 and consists of the members Jono Grant, Tony McGuinness, and Finnish Paavo Siljamäki. They have their own record label Anjunabeats, which releases trance and progressive music, and they also host their own weekly radio show Trance...

, Carl Cox

Carl Cox

Carl Cox is a British techno and house music DJ.-Biography:Cox grew up in Oldham, Lancashire, before attending Glastonbury High Boys secondary modern school on Glastonbury Road in Morden. Cox began his career as a hardcore and rave DJ in the mid 1980s...

, De Jeugd van Tegenwoordig

De Jeugd van Tegenwoordig

De Jeugd van Tegenwoordig is a Dutch hip hop and R&B group based in Amsterdam, The Netherlands, renowned for their musical approach of irreverent, humorous lyrics and electronic beats...

, Fedde le Grand

Fedde le Grand

Fedde le Grand is a Dutch house DJ and producer whose single "Put Your Hands Up For Detroit" / "Put Your Hands Up 4 Detroit" reached number one on the UK's singles and the top 5 in the Dutch singles chart, and spent five weeks in the Spanish dance chart...

, Ferry Corsten

Ferry Corsten

Ferry Corsten, also known under the alias System F, is a Dutch producer of trance music, in addition to being a DJ and remixer. He also hosts his own weekly radio show, Corsten's Countdown. He routinely plays at events all over the world with crowds in excess of tens of thousands. In 2009 Ferry...

, Sander van Doorn

Sander van Doorn

Sander van Doorn Sander van Doorn Sander van Doorn (born Sander Ketelaars [] on February 28, 1979 in Eindhoven, Noord-Brabant, Netherlands is a Dutch tech trance DJ and producer...

, Swedish House Mafia

Swedish House Mafia

Swedish House Mafia is a Swedish House Music group consisting of the three disc jockeys and producers; Axwell, Steve Angello and Sebastian Ingrosso. The group officially formed in late 2008....

, Cosmic Gate

Cosmic Gate

Cosmic Gate is a German trance duo made up of Claus Terhoeven and Stefan Bossems . Both from Krefeld in Germany. On October 28, 2009, DJ Magazine announced the results of their annual Top 100 DJ Poll, with Ultra Records artist Cosmic Gate placed #19, 43 spots above the group's ranking the year...

, Avicii

Avicii

Tim "The Phoenix" Bergling , known professionally as Avicii, Tim Berg, "Ashwin", "Yeshel", "Harshil" and Tom Hangs, is a Swedish DJ, remixer, and record producer. His single "Bromance" has charted in the top 20 on the national single charts of Belgium, the Netherlands, and his native Sweden...

, Faithless

Faithless

Faithless were a British electronica band consisting of Maxi Jazz, Sister Bliss and Rollo. The group is best known for their dance songs . Faithless recorded six albums. During their career they sold over 15 million records worldwide...

, Tiësto

Tiësto

Tijs Michiel Verwest, , known as Tiësto , is a Dutch musician, DJ and record producer of electronic dance music. Although he has used many aliases in the past, he is best known for his work as DJ Tiësto...

, Laidback Luke

Laidback Luke

Laidback Luke is a Dutch DJ, producer. He was voted #46 on DJ Mag's Top 100 DJ list in 2008, before jumping to #27 in 2009 and jumping up 10 places in 2010....

, David Guetta

David Guetta

Pierre David Guetta , known professionally as David Guetta , is a French house music producer and DJ. Originally a DJ at nightclubs during the 1980s and 1990s, he co-founded Gum Productions and released his first album, Just a Little More Love, in 2002. Later, he released Guetta Blaster and Pop Life...

 and 2 Many DJ's.