Calypso music
The first major stars of calypso started crossing over to new audiences worldwide in the late 1930s. Attila the Hun, Roaring Lion and Lord Invader were first, followed by Lord Kitchener, one of the longest-lasting calypso stars in history—he continued to release hit records until his death in 2000. 1944's "Rum and Coca-Cola" by the Andrews Sisters, a cover version of a Lord Invader song, became an American hit despite the song being a very critical commentary on the explosion of prostitution, inflation and other negative influences accompanying the American military bases in Trinidad at the time. Perhaps the most straightforward way to describe the focus of calypso is that it articulated itself as a form of protest against the authoritarian colonial culture which existed at the time.
Mento
Due in part to Belafonte's popularity, mento became widely conflated with calypso in the 1950s. In a 1957 interview for "Calypso Star" magazine, Lord Flea explained:
"In Jamaica, we call our music 'mento' until very recently. Today, 'calypso' is beginning to be used for all kinds of West Indian music. This is because it's become so commercialized there. Some people like to think of West Indians as carefree natives who work and sing and play and laugh their lives away. But this isn't so. Most of the people there are hard working folks, and many of them are smart business men. If the tourists want "calypso", that's what we sell them." 
This was the golden age of mento, as records pressed by Stanley Motta, Ivan Chin, Ken Khouri and others brought the music to a new audience. In the 1960s it became overshadowed by ska and reggae. Mento is still played in Jamaica, especially in areas frequented by tourists. Lloyd Bradley, reggae historian and author of the seminal reggae book, "Bass Culture," said that Lee "Scratch" Perry’s seminal 1976 dub album, "Super Ape," contained some of the purest mento influences he knew. This style of music was revived in popularity by the Jolly Boys in the late 1980s and early 1990s with the release of four recordings on First Warning Records/Rykodisc and a tour that included the United States. Stanley Beckford and Gilzene and the Blue Light Mento Band also revived rural mento in the 2000s. The mento dance is a Jamaican folk-form dance with acoustic guitar, banjo, hand drums and rhumba box.