BREAKING: Ultra Music Festival ANNOUNCEMENT (LIVE)

Ultra Music Festival promised to shock with a live announcement on YouTube Monday, and they totally doubled down: the massive bash in downtown Miami will spread to two weekends -- TWO WHOLE WEEKENDS -- in 2013.

In other words, meet Bayfront Park's neon Coachella. Organizers revealed at noon that the formerly 3-day festival, already one of the biggest of its kind in the world, will begin over March 15-17 and continue the previously announced weekend of March 22-24.

There's no word yet on how the move impacts ticket prices. Next year's lineup is still under wraps, too, but expect the biggest acts in EDM as usual. The 2012 bacchanalia included Avicii, Tiesto, David Guetta, Justice, Skrillex, Afrojack, Laidback Luke, Armin Van Buuren, New Order, Kraftwerk, a surprise controversial appearance by Madonna herself, and more.

For Miami music lovers, double the Ultra is great news. For Miami economy watchers, it could be even better: a recent study from the Washington Economics Group Inc. found that the 15-year-old festival dumps some $79 million into the South Florida economy each year.

“We always knew from the huge crowds that we draw that we had a major impact on our local economy, but we did not realize it was this huge,” said Russell Faibisch, Ultra's creator and executive director. “Last year people in all 50 states and more than 75 countries bought tickets to attend."

Faibisch and his cohorts have been teasing the announcement for weeks, noting the 2013 fest will be Ultra's 15th Anniversary -- a long way from its humble one-day beginnings during the 1999 Winter Music Festival.

"We will announce something so big, so crazy, so intense that it will knock you off your seats and leave you thinking 'WTF!' We're gearing up to make global EDM history, and do something that NO electronic music festival has EVER done," festival organizers pledged on Facebook.