The term "pop" is short for popular music. As long as music has
been around there has been popular music. The sound of popular
music has changed over the years the same way that fashion has
changed over the years.
The singer, songwriter and actresss, Skye Sweetnam, is Canadian
born. Her original genre of music was pop-punk. Pop-punk music is a
fusion of punk rock with pop rock music. Ms. Sweetnam later changed
her genre to simply pop.
Society has changed,people listening to the music change,so
everything else ahs to or it dies off like children today seem to
be more ``adult`` so everything that relates to them has to change
to stay àround
It is not possible to answer this question until you tell us
which band you are asking about. There have been thousands of rock
music and pop music (top-40) groups since the music changed over
from Big Band music of the 1940s to rock and roll in the 1950s.