Heavy metal music styles in its early years, but by 1969 vocalist Ian Gillan and guitarist Ritchie Blackmore had led the band toward the developing heavy metal style. In 1970, Black Sabbath and Deep Purple scored major UK chart hits with "Paranoid" and "Black Night", respectively. That same year, two other British bands released debut albums in a heavy metal mode: Uriah Heep with "...Very 'Eavy ...Very 'Umble" and UFO with "UFO 1". Bloodrock released their self-titled debut album, containing a collection of heavy guitar riffs, gruff style vocals and sadistic and macabre lyrics. The influential Budgie brought the new metal sound into
Heavy metal music off". Nu metal gained mainstream success through heavy MTV rotation and Ozzy Osbourne's 1996 introduction of Ozzfest, which led the media to talk of a resurgence of heavy metal. In 1999, "Billboard" noted that there were more than 500 specialty metal radio shows in the United States, nearly three times as many as ten years before. While nu metal was widely popular, traditional metal fans did not fully embrace the style. By early 2003, the movement's popularity was on the wane, though several nu metal acts such as Korn or Limp Bizkit retained substantial followings. Metalcore, a hybrid of extreme