Answer: catchy

AnswerCrossword Clue
CATCHY

Hard to forget

CATCHY

Easily hummable

CATCHY

Attention-getting

CATCHY
Hummable, perhaps
CATCHY
Like musical hooks
CATCHYAppealing, as a song.
CATCHYLike many a good tune.
CATCHYLike some tunes
CATCHYEasily remembered
CATCHYLike lilting tunes
CATCHYInterest-grabbing
CATCHYLike a memorable tune
CATCHYAttention getting
CATCHYLike a good jingle
CATCHYLike a hit song
CATCHYLike the hook of a good pop song