Best of Etta James, Ella Fitzgerald, Sarah Vaughan

What is your favorite album or 'must own' song or recording by the following artists:

Etta James
Ella Fitzgerald
Sarah Vaughan
Billie Holiday

Just looking to pick up a few new CD's and there are SO many from these catalogues. Content is the MOST important, quality is second. If the recording is the best of both, great!!!

Thanks!