The track begins with a sample of the song "By the Sea" by the teenage sibling duo Wendy and Bonnie,[REF] from their 1969 album Genesis, which Super Furries singer Gruff Rhys has described as "amazing songs, amazing lyrics and amazing voices" [REF].
"Hello Sunshine" shares the same key, D major, the same guitar tuning, D-A-D-D-A-D, and was written around the same time as several other songs from Phantom Power including the "Father Father" instrumentals, "Golden Retriever", "Cityscape Skybaby" and "Out of Control" [REF].