Last week, the third and final phase of the Ultra Music Festival was posted, adding LMFAO and Sander Kleinenberg (among others) to the already massive line-up that includes Damian Marley and Nas, Passion Pit, Tiesto, A-Trak, Bassnectar, Crookers, The Bloody Beetroots, Major Lazer, and hundreds more.

This year will feature some special collaborations – Florence (from Florence and the Machine) will join Swedish House Mafia on the Ultra Main Stage on Saturday, and Kelis, whose sound as taken a turn towards electro, will team up with Benny Benassi for a few songs.

Four new arenas have been added to the festival grounds – the UMF Ibiza Tent, the UMF Brazil Tent, the Root Society Dome, and the Heineken Dome Experience – bringing the total to a staggering ten (yes, TEN) stages.

Another new addition to Ultra is Sonic Forest, an interactive installation by artist/composer Christopher Janney that will entice festival goers into a unique environment with aural and visual components. Sonic Forest is composed of eight-foot tall aluminum poles that trigger melodic and environmental sounds as people move through the “electronic trees”. Independent drummers will be present in the Forest during various parts of the installation. Sonic Forest has been featured at Bonnaroo, All Points West, and Coachella in the US, and various festivals around the world.

This is shaping up to be the best Ultra to date, and is certainly not to be missed if you’re going to be in Miami for the Winter Music Conference. CLICK HERE to purchase tickets, and be sure to check out The HiFi Cartel Guide to the Winter Music Conference for more events in Miami that week.