Crossword Clue:

A short simple song with a refrain

AnswerCrossword Clue
DITTYA short, simple song.
ROUNDELAYSong with a refrain
SCARBOROUGHFAIR'68 song with a four-herb refrain
IMAGINEJohn Lennon song with the refrain "You may say I'm a dreamer ..."
DITTYShort and simple song.
OPPNaughty by Nature song with the refrain "yeah, you know me!"