She's always dressed pretty nice, and fairly conservative... the closest Alison ever got to risqué I can remember was a white sheer outfit that got... uhhhh...
backlit on the CMA's one time. I appreciate that she never overtly trashed-up for the cameras and generally avoided media attention at all. And at risk of sounding stodgy or prudish, I just never thought of her that way, or the other girls in the bluegrass community for that matter. It just kinda' felt wrong. Maybe it's because I grew up playing in bands with girls... and we just always had to watch out for them in certain places we played at. It got to be more of a brotherly role. They watch my six these days.
FWIW, the live performance of My Poor Old Heart was pretty good. The dress was nice too. The fiddle break probably would've been better in the days of IEM's. I've heard her just slay the double-stop intro to it. She clearly couldn't hear well enough to take the chance.