the melody of the light music

Light music is music for popular entertainment. It is also a generic term applied to a mainly British musical style of "light" orchestral music. The style is a less "serious" form of Western classical music. Light music delights mass audience.

Light music has a strong melody, an interesting musical setting--a unique counter-melody, counter-rhythms, re-harmonization, interesting chord progression, a sense of balance and contrast. It usually contains broadly romantic themes, happy pizzicato and string fantasias, clever novelty pieces, tuneful marches, or jazz-influenced sophisticated arrangements. Some of the light music come from ballet and operetta scores and Broadway musical theatre.

Adjectives:

beautiful, catchy, convivial, light-hearted, lively, lovely, mellifluous, memorable, melodic, merry, pleasant, pleasing, romantic, sentimental, smooth, soft, sweet, tuneful

Note:
mellifluous = having pleasantly smooth sound
convivial = friendly and cheerful

題外:
Famous light music composers/conductors:
Arthur Fiedler, Annunzio Mantovani, Percy Faith, Raymond Conniff. Henry Mancini, Ennio Morricone, Eric Coates, Ernest Tomlinson