XX (Mushroomhead album)

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.