Joel Thomas Zimmerman, known professionally as Deadmau5, is a Canadian electronic music producer and DJ. His musical style mostly includes progressive house and electro house genres, though he also produces and DJs other genres of electronic music, including techno under the alias Testpilot. Zimmerman mostly appears and performs with a custom helmet called the "mau5head". He has received seven Grammy Award nominations and won four Juno Awards for his songs.