bitflipper
Already mentioned, but I thought I'd add this link to a recent live performance at the Rock 'n Roll Hall of Fame. Nancy's almost my age, but she's still got it...
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Always enjoyed this band ... I think it helped that the vocals were always tight and really well done, with excellent moments all around.
Not quite as good, but a bit more in the progressive vein of things, is Lana Lane and the Rocket Scientists, from LA. Lana has the same similar range and power as this band, however, I always thought the lyrical style in Lana's work, needed a bit more poetic, and emotional definition, as at times it does not come as clear, concise and as well defined as it has been for HEART for many years ... as one can say, you knew it was from the heart ... right from the start!