Led Zeppelin will take part in Record Store Day -- April 21st -- for the first time with an exclusive release.
In celebration of their 50th anniversary, they'll release a limited-edition seven-inch single of unheard studio mixes of "Rock and Roll" backed with "Friends." Produced by Jimmy Page, it is pressed on yellow vinyl.
"Rock and Roll" is from the unreleased Sunset Sound Mixes of Led Zeppelin 4. And "Friends" is stripped down without the orchestration of the final mix.
Source: LedZeppelin.com photo credit - iHM archive