 Originally expected to be released as a physical single on May 21, 2007, the release was instead replaced by another digital release, "Earth Intruders - Club Mixes", via iTunes.Indeed, there were no chart eligible physical singles released at all during the "Volta" era, although box sets were eventually released of each single some months after the corresponding digital release.The second single from "Volta" was originally meant to be "Declare Independence", but due to the worldwide success of "Volta" Björk had to perform more international promotion work than her label One Little Indian had originally planned, meaning that the previously planned video shoot for "Declare Independence" with Michel Gondry in London could not take place.