XX (pronounced Double X) is a compilation album by American metal band Mushroomhead, released in 2001. It was originally released through Eclipse Records, where Mushroomhead took classic tracks and remixed them. XX was re-released on Universal Records in December of the same year. XX contains tracks from the band's three independently released albums: Mushroomhead, Superbuick, and M3. Being the first Mushroomhead album released on a major label, XX's re-release on Universal Records introduced Mushroomhead on a national and international level, while they were previously just a regionally known band. The album has sold over 300,000 copies. Musically, the album is primarily within the genres of industrial metal, nu metal and alternative metal with a diverse influence from genres such as gothic rock, punk rock, techno, and hip hop. Compared to the Universal Records release, the Eclipse Records version contains clearer production that's more faithful to the original albums, a different track listing, and a hidden prank call. The original version features the newly recorded track "Epiphany". The reissued version removes "Epiphany", but includes the newly recorded track "Empty Spaces" along with remixes of "Too Much Nothing" and "Fear Held Dear". Jeffrey Nothing – vocals J Mann – vocals Skinny – drums Shmotz – keyboards JJ Righteous – guitars (tracks 1–9, 11–14) Pig Benis – bass (tracks 1–11, 13) Bronson – samples (tracks 1, 3, 6, 9, 11); guitars (track 10, Universal version) Gr