M83 reached out to the singer Mai Lan and the guitarist Steve Vai for help on "Go!" "We asked [Vai] for the craziest space solo possible," Anthony Gonazalez explained, "which wasn't hard for him. He sent us three different takes, and we blended two to make the ultimate Steve Vai solo. It was amazing to work with him." "Go!" will appear on Junk, which hits shelves April 8. Listen above.