noun, noun or participle which takes 'suru', transitive verb
singing enthusiastically; passionate singing
Refers to singing with great energy and emotion, often in a performance or karaoke setting. Can be used as a noun or as a suru-verb (熱唱する).
彼女はステージでヒット曲を熱唱した。
She sang a hit song passionately on stage.
カラオケで友達がアニソンを熱唱している。
My friend is enthusiastically singing an anime song at karaoke.