June 20, 2015 live show. It is rare to see women-only groups in Hellfest. L7 is the exception in 10th edition but also one of the best in his favorite genre, grunge. Newly reformed with its original members, the quartet had its peak in the early 1990s with third album Heavy Bricks, produced by Butch Vig (Nirvana). With large and heavy guitars not devoid of catchy melodies, the group mind "riot grrl" has lost none of his enthusiasm despite fourteen years of hiatus.