Australia's Soundwave Festival is typically one of the first major rock events of the year, and as the festival hits 15 years in business, it's still drawing the top names. Slipknot, Faith No More, Soundgarden and Slash are among the top-billed acts at the just-announced 2015 run.

Organizers are varying things up this year, making Soundwave a two-day music festival taking place over two weekends in four Australian cities. The lineups will just swap cities the day after they perform in one of the locations.

The fun starts Feb. 21 in Adelaide and Melbourne. In Adelaide, concertgoers will get a bill that includes Faith No More, Soundgarden, Incubus, Lamb of God, Ministry, Antemasque, Gerard Way, Mayhem, New Found Glory, Fear Factory, Hollywood Undead, Nothing More, Atreyu, and many more, while Melbourne gets Slipknot, Slash, Marilyn Manson, Fall Out Boy, Judas Priest, GodsmackPapa Roach, Of Mice & Men, Escape the Fate, Apocalyptica, Butcher Babies, coldrain and others. The following day (Feb. 22) the bills will switch locations.

The following weekend, the Faith No More bill heads to Sydney on Feb. 28, while Brisbane gets the Slipknot lineup before the two bills switch cities on March 1.

To see the full lineups, click here and if you're interested in purchasing tickets, the pre-sale starts this Friday (Aug. 22). You can sign up for the mailing list at the website to be eligible for the pre-sale tickets.