If we count from the 80's until now;
Pop:
A-ha (Take On Me. Feel This Moment samples it.)
Aqua (Barbie Girl. Danish/Norwegian but we claim them as ours as well
)
Tone Damli
Gabrielle (I stan
)
Maria Mena
Margaret Berger
Country:
Kurt Nilsen (Winner of World Idol. He won against Kelly Clarkson sistren)
Don't know the genre..
Kaizers Orchestra (I don't even know if this is correctly written...)
Rappers:
Erik og Kriss
Karpe Diem
Madcon
We mostly have one-hit wonders I guess (even in our country. Most of these mentioned aren't in that case though)
Most Norwegian artists write their own music and are very good at it.