it's called a ''song'' becos everything have to be sung.
if jay wants to talk/rap, he can just be a host loh. 
Main Entry: Song
Pronunciation: 'so[ng]
Function: noun
Etymology: Middle English, from Old English sang; akin to Old
English singan to sing
1 : the act or art of singing
2 : poetical composition
3 a : a short musical composition of words and music b : a
collection of such compositions
4 : a distinctive or characteristic sound or series of sounds (as
of a bird or insect)
5 a : a melody for a lyric poem or ballad b : a poem easily set to
music
6 a : a habitual or characteristic manner b : a violent, abusive,
or noisy reaction
7 : a small amount
- song·like /-"lIk/ adjective