Original Chicago House Lyrics Follow

The Original Six is the group of six teams that made up the National Hockey League (NHL) for the 25 seasons between the 1942–43 season and the 1967 NHL expansion. These six teams are the Boston Bruins, Chicago Black Hawks, Detroit Red Wings, Montreal Canadiens, New York Rangers, and the Toronto Maple Leafs, all of which are still active franchises in the league.
Of the Original Six, only the Toronto Maple Leafs have not advanced to the Stanley Cup Finals since the expansion, while the other five have appeared in at least three Finals since 1967 and have each won a championship at least once.
The term was not used during the era, having originated after the 1967 expansion. Only Montreal and Toronto are actual original charter members of the NHL in 1917, but all six joined the NHL in the league's first decade, and are commonly considered as a traditional set.

Source: Wikipedia