This is what we found on Wikipedia regarding the The World Of Musicals:

The Musical of Musicals (The Musical!) is a musical by Joanne Bogart and Eric Rockwell. It has five acts, each of which is a short musical parodying (and paying homage to) the style of an American or British musical theater composer or composer/lyricist team, all dealing with roughly the same classic melodrama plot: "I can't pay the rent!"

The musical premiered off-Broadway in 2003 at the York Theatre. It again played off-Broadway in 2005 at the Dodger Stages V with the same cast. It also had a production on London's West End, in Australia (Canberra - 2009 and February 2010) as well as numerous productions in U.S. regional theaters and in Canada.