All By Myself was first written and recorded by Eric Carmen in 1975, borrowing its melody from Rachmaninoff. Celine Dion covered it for her 1996 album Falling into You, and her version became a worldwide hit thanks to its dramatic vocal climax. Online, that chorus was clipped into a shorthand for loneliness, in the same sad meme family as Hello darkness my old friend, and it still works because the emotion is instantly clear even without the rest of the song.