The album features several well-known guest musicians and producers, including Tom Waits, James Hetfield (of Metallica), Jim Martin (former member of Faith No More), Fred Durst (of Limp Bizkit), and Tom Morello (of Rage Against the Machine).
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While producing the song "Lacquer Head", Durst encouraged Primus to return to the more aggressive metal sound of their earlier albums for Antipop.