one-hit wonder

Translations
исполнитель одного хита
The band was a one-hit wonder, famous for just that one song.
Группа была исполнителем одного хита, известная только одной песней.
Definitions
A one-hit wonder is an artist, band, or performer who achieves mainstream popularity or success with a single song, album, or project, but fails to replicate that level of success with subsequent works.