Daft Punk are French electronica duo Guy-Manuel de Homem-Christo and Thomas Bangalter. At least as far as we know. It’s been said that on September 9, 1999 the sampler in their studio exploded and they were reborn as robots.
Deadmau5 is a house music DJ known for his mouse helmets. His identity originates from high school, when his computer fried a mouse that had gotten inside of it. Seems as good a reason as any for dressing up as a giant mouse.
Carbon Costume 
