"All of the Pieces" is the debut solo single by Australian recording artist Reigan Derry. It was written by Adam Argyle, Becky Hill and Martin Brammer, and produced by Argyle and Brammer. "All of the Pieces" was released to Australian radio on 27 November 2014 as the lead single from Derry's first extended play of the same name. Musically, "All of the Pieces" is a mid-tempo alternative pop ballad with folk influences. The song received a positive reception from various publications and was compared to works by several other artists, including Florence and the Machine, Marina and the Diamonds, Paloma Faith and Ella Henderson.

Upon its release, "All of the Pieces" debuted at number thirty-three on the ARIA Singles Chart. The accompanying music video was directed by Gemma Lee and features Derry singing the song's lyrics in a rainforest. "All of the Pieces" was promoted with live performances and used in a Seven Network commercial for the American television series State of Affairs.

Derry originally began her recording career as a member of the Australian girl group Scarlett Belle. After three singles releases, the group disbanded in May 2011 to focus on individual pursuits. Three years later, Derry auditioned for the sixth season of The X Factor Australia and successfully progressed to the live shows. She was eliminated in the semi-final week of the competition and finished in fourth place. On 29 October 2014, it was revealed that Derry had signed a recording contract with Sony Music Australia and would be releasing "All of the Pieces" as her debut solo single. The song also served as the lead single from Derry's first extended play of the same name. "All of the Pieces" was originally scheduled to impact Australian radio stations on 20 November 2014. However, its radio release was pushed back by one week to 27 November.

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