In his Book of the Ground Breaking Television Series "Walk on By", Alan Lewens Wrote of the Brilliance that a Single Defining Performance Can Bring to a Song. It was from this Thought that the Idea for a Sister Soundtrack Album to the Television Series and Book of the Same Name was Hatched. With a Great Deal of Subjectivity, 50 from the Hundreds of Songs Referenced in the Series and Book were Selected. Next, in a Courageous Attempt to Uncover Those "defining Performances" a Staggering Number of Different Versions of Each were Listed to "Stardust", for Example, Has Nearly 2,000 Record Versions. The End Result is a Two Volume, Four CD Celebration of Some of the 20th Century"s Most Influential Songs, Interpreted by an Array of Legendary Performers.