I'm Not the Only One

Sam Smith's "I'm Not the Only One" is a soul-infused piano ballad that became a defining track from their debut album, In the Lonely Hour (2014). Co-written with Jimmy Napes and produced by Napes and Steve Fitzmaurice, the song explores the pain of infidelity in a relationship, drawing from a marriage Smith and Napes knew personally. Released as the album's third single in the UK on 31 August 2014 and as the second single in the US on 24 September, it also spawned a remix featuring rapper A$AP Rocky.

The track's orchestral strings and gospel-like structure support Smith's raw, emotional vocals, earning critical praise. Commercially, it soared: number one in South Africa, top three in the UK, top five in the US, and top ten in over a dozen countries. It achieved Diamond certification in Australia, seven-times platinum in the US, and multiplatinum status in ten other nations. In 2016, it was South Korea's bestselling international song. The accompanying music video, starring Dianna Agron and Chris Messina, mirrors the song's themes of betrayal.[edit]