If I might add to i_like_lectric_motor's post above, I don't think any supergoups have been mentioned yet. Here's a Wikipedia quote:
"In the late 1960s, the term supergroup was coined to describe "a rock music group whose performers are already famous from having performed individually or in other groups."[1][2] In some cases, an act will later be referred to as a supergroup when multiple members from said group end up securing individual fame later on. Supergroups are often short-lived, lasting only for an album or two, although this is not always the case..."
