Copines comes from the French pop song by Aya Nakamura, released in 2018 on her album Nakamura. The title means girlfriends or female friends in French, and the chorus became a staple for friendship content online. It spread widely through Instagram Reels and TikTok, where users looped the hook for fashion, beauty and group videos. Its continued popularity comes from the instantly recognisable melody and the celebratory theme, which fits best friend edits without needing the listener to understand every lyric.