"Antipop" was released in 1999, and featured production and guest appearances from James Hetfield from Metallica, Tom Morello from Rage Against the Machine, Matt Stone from "South Park", Stewart Copeland from the Police, Jim Martin from Faith No More and Fred Durst from Limp Bizkit. While producing the song "Lacquer Head", Durst encouraged Primus to return to the more aggressive sound of their earlier albums for "Antipop". Some critics compared the album's murky downtuned guitars to nu metal, which was popular during the time. The band toured in support of "Antipop" at Ozzfest and on the Family Values Tour. The band released a music video for the album's only single, "Lacquer Head", which was banned from MTV because of references to and depictions of drug use, despite the song's anti-drug message. Tensions among the band rose considerably during this period, Claypool stated "there was some doubt at the label as to whether we knew what the hell we were doing anymore."