hit song; best-selling song
Refers to a song that has achieved widespread popularity and high sales or streaming numbers. The gloss 'best-seller' is understood in the context of music.
Her new hit song is often played on the radio.
このアルバムにはヒット曲がたくさん入っている。
This album contains many hit songs.
That composer has produced many hit songs.
This song became a hit right after its release.
I sang her hit song at the concert.