(Yahoo!) - Los Angeles is getting ready to rock, dance music-style, with the announcement of Hard Summer's line up.

The 6th annual festival will again take place the first weekend of August in downtown L.A.'s State Historic Park, and will feature headliners that include Knife Party, Justice (performing a DJ set), Duck Sauce, Dog Blood, Bassnectar, Empire Of The Sun, Zedd, Crystal Castles, Flux Pavilion, Flying Lotus, 2 Chainz, Baauer, Dillon Francis, Azealia Banks, Sbtrkt (Dj Set), Disclosure, Kill The Noise, Alvin Risk, Just Blaze and many more acts.

The electronic music fest, put on by Hard Events (also the producers of HARD Day of the Dead and the Holy Ship!!! cruise), seems to be attracting bigger names every year.

And to highlight this year's artists, Hard Events unleashed an awesome promotional video, featuring some of their biggest 2013 acts … dressed like dogs! (and, in one case, ducks!) In many ways, the trailer (directed by Agata Alexander) is inspired by Skrillex's new side DJ project with Boys Noize, Dog Blood. This one is definitely worth watching, for dance music and canine fans alike.