Clare Bowen and Sam Palladio as Scarlett O'Connor and Gunnar Scott: "If I Didn't Know Better"
We admit, the Scarlett-Gunnar duets deserve their own list. But the one that solidified these star-crossed lovers as a match made in Bluebird heaven came early in Season One with "If I Didn't Know Better." Clare Bowen, a classically trained singer with a voice that rivals Alison Krauss, delivers a haunting performance of the sensual ballad, with chilling and seemingly effortless accompaniment by Sam Palladio. It's a cover that does the track's original singers, the now-defunct Civil Wars, proud.