Much like food, when you mix two songs together, the results can be incredible (coffee with chocolate milk) or incredibly terrible (peanut butter and pickles). The Quicksand performance that mixed GB and the Smiths together was clearly incredible from start to finish, much like Cold World's mixing of The Smiths with Mobb Deep. But just because you take two good bands and put them together, doesn't necessarily make for greatness (I love Sick of It All and I love Mobb Deep, but their version of "Survival of the Fittest" is almost unlistenable).
So with that being said, here is Kate Nash and Billy Bragg together, doing two of my favorite songs of theirs together. To be honest, it starts out great with "foundations" and when Billy Bragg kicks in with the opening lyrics to "New England" ur moshing, but I really wish Kate Nash would have shut the fuck up during the chorus.