"Ma meilleure ennemie" (English: 'My Best Enemy') is a song by Belgian singer-songwriter Stromae and French musician Pomme. It was released on 23 November 2024 as part of the soundtrack to the second season of the Netflix animated series Arcane (2024), and later impacted Italian radio on 6 December, through Riot Games and Virgin Music. The song was written by the artists alongside Alexander Seaver, as well as Stromae's brother and long-time collaborator Luc Van Haver.
In April 2025, an extended version of the soundtrack was released, which includes a new version of "Ma meilleure ennemie" featuring British rock band Coldplay and Palestinian-Chilean singer Elyanna.