Have you heard the song Where Is the Love by Black Eyed Peas, I took an instant liking to this song.

听过黑眼豆豆的《爱在哪里》这首歌吗？我一听就立刻喜欢上了这首歌。

Yeah, I like it too.

听过，我也喜欢。

重点讲解:

I was at once interested in this song.

I took an instant liking to this song.

表达“我立刻就喜欢上了这首歌。”可以说：I was at once interested in this song.短语be interested in有“对......感兴趣；喜欢的意思，但是口语中更常用take an instant liking to sth.表达“立刻喜欢上某事/某物”。