Downsyde are an Australian hip hop group from Perth, Western Australia. The group is composed of three members, Optamus, Dazastah and Dyna-Mikes. The group has performed alongside groups including Jurassic 5, Cypress Hill, Grandmaster Flash, The Black Eyed Peas, and The Roots. They also performed with Australian acts like Hilltop Hoods, Resin Dogs, and Koolism. The band has also performed at a number of festivals, including Big Day Out, Splendour in the Grass, Rock-It, Falls Festival, Homebake, Good Vibrations and the Southbound Festival.