Demonstrating her creative and vocal prowess, Ella Fitzgerald refers to Louis via vocal impressions when she sings several lines in Louis' characteristic husky low register.

Sarah Vaughan also covers a big band hit "Perdido." Vaughan is backed by a big band ensemble. Nevertheless, the singer's voice does not compete with the horn section. Her voice integrates itself perfectly with the big band backing her. Like Fitzgerald, Vaughan displays extraordinary range, flitting from one octave to the next. Her tone is rich and thick. Vaughan includes vocal flourishes such as shrieks and trills, and she does include scat at the end. Her command of "Perdido" is admirable, and she comes across as the band leader as well as the lead vocalist. Carrying the melody, Vaughan hits individual notes along a long scale as if her voice were a piano and when timing calls for it, she also inserts vocalizations as a...
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