Her voice is still pretty low. While a guest on Michael Parkinson's show, Kathleen Turner told an amusing anecdote about working with her. Lauren would greet Kathleen with "Good morning, Miss Turner!" in a very deep pitch. Kathleen would respond with "Good morning, Miss Bacall!" in an even deeper pitch. Lauren would then reply at an even deeper pitch, and so forth.
My worth on voice training: practice your feminine tones whispering. This lets you concentrate on getting the right resonances in your head, allowing you to (temporarily) ignore the chest reverberations & the tone produced by the vocal chords.
Singing is good, too. Singing high notes is (usually) easier than speaking at a higher pitch, and is less likely to cause wear & tear on your vocal chords. But it's not really about producing high notes, it's about allowing the higher notes to resonate while not allowing the deeper notes to do so. That's why the whispering technique can be so helpful.
FWIW, I was a boy soprano before my voice broke, but I've still got a fairly wide range.
Robin