While disco and theatrical rock was raging in America, a different stream of music was emerging from the streets of England called punk. The centerpiece of this music was no doubt the Sex Pistols with Johnny Rotten in lead vocals and Sid Vicious on bass. They casually admit that they couldn't sing or play the instruments so they just played loud and raunchy which became the template for punk music. Learn three chords and start a band was their motto. Other musicians were also grouped into this category such as Elvis Costello, but really didn't have any commonality to the likes of Sex Pistols musically.
        
        10 years after England discovered punk, America finds its own brand of music from the streets called the Grunge. The music lacked the virtuosity, but punk was very rock in that it was a way for youth to express their thoughts and feelings.