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. JBM 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.
Marchant contributied to the music score of the film Lovers in a Dangerous Time.
Offical website is www.jbm-music.com .

2. JBM is an English hardcore band from St. Albans, Hertfordshire
Rou (lead singer and synth from Enter Shikari) is the guitarist for JBM.

3. JBM is a Japanese hiphop group Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.