Music from Cuba

The Caribbean island of Cuba has developed a wide range of creolized musical styles, based on its cultural origins in Europe and Africa. Since the 19th century its music has been hugely popular and influential throughout the world. It has been perhaps the most popular form of world music since the introduction of recording technology.
The music of Cuba, including the instruments and the dances, is mostly of European (Spanish) and African origin. Most forms of the present day are creolized fusions and mixtures of these two sources. Almost nothing remains of the original Indian traditions.^[1] 

From Wikipedia 

Music from Croatia

The music of Croatia, like the divisions of the country itself, has two major influences: a Central European one, present in central and northern parts of the country and in Slavonia, and a Mediterranean one, present in coastal regions of Dalmatia and Istria.

In Croatia both pop and rock are popular, as well as pop music influenced by Dalmatian or Slavonian folk elements.

From the mid-20th century onwards, so-called schlager music and chanson-inspired music have formed the backbone of the Croatian popular music. 

From Wikipedia.

Music from Côte d'Ivoire (The Ivory Coast)

Each of the more than sixty ethnic groups of Ivory Coast has its own folk music traditions, most showing strong vocal polyphony (a common characteristic of African music), especially the Baoulé. Talking drums are also common, especially among the Appollo, who are also known for their abissa purification dance, part of the popular Zoblazo dance music of Meiway. Polyrhythm, another African characteristic, is found throughout Ivory Coast, and is especially common in the southwest. 

From Wikipedia. 

Music from Costa Rica

Though its music has achieved little international credit, Costa Rican popular music genres include: an indigenous calypso scene which is distinct from the more widely-known Trinidadian calypso sound, as well as a thriving disco audience that supports nightclubs in cities like San José. American and British rock and roll and pop are very popular and common among the youth (especially urban youth), while dance-oriented genres like soca, salsa, merengue, cumbia and Tex-Mex have an appeal among a somewhat older audience.

Mexican music is very popular among older people and some people in the countryside. During the middle years of the 20th century, Costa Rica was exposed to much Mexican cultural influence.

Another new genre explored in Costa Rica is celtic with the group Peregrino Gris.

From Wikipedia

Music from the Cook Islands

The music of the Cook Islands is diverse. Christian music is extremely popular. Imene tuki is a form of unaccompanied vocal music known for a uniquely Polynesian drop in pitch at the end of the phrases, as well as staccato rhythmic outbursts of nonsensical syllables (tuki). The word 'imene' is derived from the English word 'hymn' (see Tahitian: 'himene' - Tahiti was first colonised by the English). Likewise the harmonies and tune characteristics / 'strophe patterns' of much of the music of Polynesia is western in style and derived originally from missionary influence via hymns and other church music. One unique quality of Polynesian music (it has become almost a cliché) is the use of the sustained 6th chord in vocal music, though typically the 6th chord is not used in religious music. Traditional songs and hymns are referred to as imene metua (lit. hymn of the parent/ancestor).

From Wikipedia.