Songbird: Rare Tracks & Forgotten Gems (Box Set)
Released: Sep 2007
Label: Rhino/Warner Bros.
Starting with recordings from the late '60s, this assembly of unreleased material and extras may not be a collection of hen's teeth, but it makes a good case for Harris' unfailing consistency through the decades. The guests here alone -- Willie, Waylon, Johnny Cash, George Jones, etc. -- attest to her canonical significance in country music, but the sweet spot comes right in the middle, where Harris performs alongside other leading ladies like Linda Ronstadt and Dolly Parton.