You can legally stream or purchase the MP3 of "The One" through several official platforms:
: Lead singer Steve Garrigan wrote the song as a last-minute wedding present for the band's engineer, Phil Magee. Kodaline - The One MP3
: The studio version features a string section the band discovered while in Prague. Where to Listen and Download You can legally stream or purchase the MP3
: Digital copies can be purchased from retailers like Amazon Music and Qobuz . Kodaline - The One MP3