XX (pronounced Double X) is a compilation album by American metal band Mushroomhead, released in 2001.

XX contains tracks from the band's three independently released albums: Mushroomhead, Superbuick, and M3.

The reissued version removes "Epiphany", but includes the newly recorded track "Empty Spaces" along with remixes of "Too Much Nothing" and "Fear Held Dear".

[7] "Solitaire Unraveling" is the only song from the album to have a music video produced, which was directed by Dean Karr.

The video is set in a Southern California airplane hangar and shows the band in specially designed masks.