noun
A straightforward loanword for a song that is widely liked, often used in music contexts.
彼女はポピュラーソングを歌うのが好きだ。
She likes to sing popular songs.
Variant with a middle dot, sometimes used in titles or for clarity.
流行歌 is a more traditional Japanese term for a popular song, while ポピュラーソング is a direct loanword with a slightly more modern or Western feel.
Borrowed from English 'popular song'.