Big Day Out is the biggest music festival in the Southern Hemisphere - Hands down, no question. It attracts the best names in music and offers an atmosphere so addictive, that once you have gone returning the next year is inevitable. The best thing about Big Day Out is that year after year the lineup keeps getting better and the show keeps getting bigger. This year on the Big Day Out menu we have iconic BDO veterans, talented up-and-comers and a large serving of global superstars. We have an exciting and incredible lineup that should install feelings of euphoria into audiophiles of every genre.

Heading up the lineup is epic prog-rockers, Tool, who are down under for the first time in years. Their live show has been described as ‘unlike any other visual experience you have ever had' and are called by many, ‘the best live band in the world.' Also on the main stage are German extremists, Rammstein and the father of punk himself, Iggy Pop.

The one-woman-powerhouse, MIA, will share her genre-bending and insanely catchy tunes with Big Day Out crowds. Hot off the release of her newest and uniquely titled album, /\/\/\Y/\, the Sri-Lankan will surely put on a show to remember.

LCD Soundystem announced their retirement from music this year. But because of the runaway success of their latest record, This Is Happening, they decided to grace our shores for one last show. Be there: Because this literally is a once in a lifetime opportunity.

The Black Keys, Ratatat and Die Antwoord will all make an appearance at 2011's Big Day Out. And will surely please fans of blues-rock, hypnotic electronic and South African experimental hip-hop, (in respective order).

And Crystal Castles will be playing. Yes, the one and only Crystal Castles. Crystal Castles are abrasive and obnoxious; fast and loud; pretentious yet authentic; and very, very good. Unpredictable and anarchic Crystal Castles' live show is simply a visual representation of their sound - the most frenetic live show on Earth. Shield your ears and lock up your daughters, for Crystal Castles is sure to cause a riot.

Here is the first official Big Day Out announcement for 2011:

International Acts:

Tool

Rammstein

MIA

Crystal Castles

Iggy and the Stooges

LCD Soundsystem

Lupe Fiasco

Grinderman

Deftones

The Black Keys

Andrew WK

Wolfmother

The Jim Jones Revue

Edward Sharpe and the Magnetic Zeros

Primal Scream

Bloody Beetroots Death Crew 77

Booka Shade

Die Antwood

Vitalic

CSS

Plan B

Ratatat

Birds of Tokyo

John Butler Trio

Airbourne

Local Acts:

Street Chant

Shihad

The Naked and Famous

Six60

Kids of 88

I Am Giant 

Die!Die!Die! 

Bulletproof

But honestly Andrew WK announces it far better than I ever could. So check out the video below for the "official" announcement.

There truly is something for everyone!

Also remember that this is the very first announcement, and many other bands are likely to play at 2010's Big Day Out. 
Who would you like to see there? Seriously, if you could see any band play Big Day Out who would it be?