A band would have to have a pretty good reason to record a cover of Led Zeppelin's "Stairway to Heaven -- after all, there's pretty much no way you're going to top the original.
Mastodon have averygood reason for theirs, which was released as a single for Saturday's Record Store Day. It's a tribute to their late manager Nick John, which they've renamed "Stairway to Nick John." A big Zeppelin fan, John died of pancreatic cancer last September. The band is donating the proceeds from the single to pancreatic cancer research.