Continuing the "super" theme from below, Sara refers to The New Pornographers as a "supergroup." Wikipedia agrees with that assessment, but Carl Newman doesn't: "I'm really tired of that supergroup label, and I wish people would stop using it. None of us were known at all outside of Canada—I just don't think it's accurate."

I think I agree with Newman. I'd restrict the "supergroup" concept to entities like The Traveling Wilburys where the members were independently famous before the group was formed.