many acts have had equally vital, if less remunerative careers outside the mainstream in punk rock and its derivations, generally distinguished by a tendency to extremes of one sort or another. whether in instrumental intensity, lyric content, or performance style canadian pop music evolved with the times, reflecting worldwide trends. in the late 1970s, as punk rock, disco, and the emerging new wave ruled the landscape, canadian groups such as d.o.a., the viletones, the forgotten rebels, rough trade, diodes, teenage head, the demics, the young canadians and subhumans emerged and continued in the 1980s with popular bands like snfu, dayglo abortions and nomeansno. rough trade were particularly notable for their 1980 hit "high school confidential", one of the first explicitly lesbian-themed pop songs to crack the top 40 anywhere in the world.