what do you think are the hardest bands to cover? By cover, I don't necessarily mean mimic, but more to do a good version of their song, and I mean either hard for you or you've found hard in general. I'll start with two biggies- The Beatles- other than with a little help from my friends, are there any good Beatles covers out there? Hardly. The arrangements are already perfect. We don't need a fast in my life or a slow halter skelter. Led Zeppelin- it's hard to figure out how to do the plant vocals.