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 lyrics extolling the merits of early 1950s rock and roll. Weinstein states that in these metal songs, the words "rock" or "rock and roll" refer specifically to heavy metal and its important role. Examples include AC/DC's "Rocker"; Judas Priest’s "Rock Hard, Ride Free"; Sammy Hagar’s "Rock ‘n’ Roll Weekend"; Twisted Sister’s "I Believe in Rock ‘n’ Roll"; Motorhead’s "Rock ‘n’ Roll"; and Ozzy’s "You Can’t Kill Rock and Roll". Some songs are self-referential to the genre. Many of these songs directly praise heavy metal (or simply "metal") and celebrate its importance. Examples include Sammy Hagar's "Heavy Metal"; Judas Priest's "Metal Meltdown";