Metal band Mastodon will contribute to Record Store Day 2012 with covers of tracks by Feist and the Flaming Lips, while Feist is returning the favor with a Mastodon cover of her own.

Mastodon have recorded a version of 'A Commotion,' a track from Feist's latest album, 'Metals,' while Feist takes on Mastodon's 'Black Tongue,' a song from their latest release. The two tracks will be released together as a split seven-inch single on April 21, while a separate single will be issued for Mastodon's cover of the Flaming Lips' 'A Spoonful Weighs a Ton.'

Feist and Mastodon met when they were guests together on the British show ‘Later With Jools Holland’ and decided to partner up for Record Store Day. As reported by our friends at Loudwire, Mastodon's Troy Sanders explained, "The idea is for Mastodon to cover a Feist song and throw some hair and dirt on it. [Feist and her band are] going to take a Mastodon song and pretty it up a little bit.”

It won't be too pretty, though, as Feist tweeted in January, "If people are expecting a cute twee cover of a metal song they have a big surprise comin. #Placebolivesagain.” Placebo is the name of a punk band Feist once played in -- not the '90s British alt-rock outfit -- so expect this cover to be loud.

A number of bands have confirmed their participation in Record Store Day 2012, which aims to help local, independent record stores. Arcade Fire recently announced plans to release two vinyl remixes to support the cause, while NME reports the Black Keys and Tim Burgess of the Charlatans UK are also onboard.