If there's something I like more than Mashup songs, it would definitely be cover songs. But not crappy covers like what a good number of tribute medleys turn out like, really good covers. But still, Hayseed Dixie is one of those fin niche bands that you didn't know you needed.
Seriously though, Bluegrass is a really fun type of music to listen to sometimes and when it's covering AC/DC and you can get a laugh out of it it's even better.
I hope you like this at least a little bit.