Black Sheep Hit: No one expected a bluegrass version of a modern country classic (Keith Whitley's "When You Say Nothing at All") to become more popular than the original, least of all Alison and the band. She has said their initial reaction to the song's progress up the charts was "Huh?"
Krauss' guest appearance on Shenandoah's "Somewhere in the Vicinity of the Heart" may count too, as it's slicker and more pop sounding than AKUS' material.
One-Hit Wonder: The aforementioned "When You Say Nothing at All" cover is the only hit for the band proper, but Krauss herself has had one #1 hit ("Buy Me a Rose", which also featured non-one-hit wonder Billy Dean) and two Top 10s as a guest artist (the aforementioned "Somewhere in the Vicinity of the Heart" and "Whiskey Lullaby"). The last of these also featured Dan Tyminski.