There are at least three artists called JBM:
1) a Canadian singer-songwriter from Montreal
2) an English hardcore band from St. Albans, Hertfordshire
3) a Japanese hiphop group 1. JMB is Jesse Brian Marchant, a Montreal-based singer-songwriter. He recorded his debut album Not Even in July in Henry Hirsch's church studio in Hudson, NY.
Marchant moved to New York at the age of 19 to pursue acting after dropping out of McGill University. He then moved to Los Angeles to write his debut album. He is trained on the guitar and also plays piano, harmonica and ukulele.