Mighty Sparrow
Calypso music enjoyed a brief period of popularity in other parts in the world during the 1950s. Trinidadian expatriate Lord Kitchener had helped popularize calypso in England, and Sparrow also found some success there. In the United States, interest in calypso was sparked largely by Harry Belafonte's 1956 album "Calypso", the first LP to sell over one million copies. In January 1958, Sparrow, along with longtime rival Lord Melody, travelled to New York City seeking access to the American music audience. Sparrow had already been recording with Balisier and Cook Records, and with Belafonte's help he also began to record for RCA Victor. He did not achieve the success he had hoped for; he said in a 2001 interview, "When nothing happened for me, I went back to England and continued on with my career."
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.