Since I have done some lead vocals playing bass at the same time I can truly say that Rebecca is A M A Z I N G. She and her bandmates have re-imagined the tune so it remains really funky on the verse with just that B String pedal sustaining the groove. Then she opens up on the Chorus and
lets the bass move around more propelling the tune forward. Crosby, Stills, and Nash wrote tunes that are very difficult vocally. Rebecca preserves the melodic line and takes it a different direction. That's a great gift. Just my take.