This is the 11937th most frequent Korean word.
노래하는
Singing.
Here, '노래하는' (singing) is used as an attributive adjective to describe the bird, indicating its action of singing.
노래하는 새가 나무 위에서 지저귀고 있어요.
The singing bird is chirping atop the tree.
Here, '노래하는' is part of the verb phrase describing the action of the children on the stage, indicating their singing as the focus of enjoyment.
아이들은 함께 무대에서 노래하는 것을 즐깁니다.
The children enjoy singing together on stage.
In this sentence, '노래하는' refers to the act of singing done by 'she', used descriptively to portray her appearance while performing the action.