A few months ago, the 22-year-old reggae singer YG Marley released his debut single “Praise Jah In The Moonlight.” It became a global hit, reaching #34 in the US and hitting the top 10 all over Europe. Name recognition probably had something to do with that. YG Marley is the grandson of Bob Marley and the son of Ms. Lauryn Hill. He co-wrote “Praise Jah In The Moonlight” his mother, and the track samples his grandfather’s song “Crisis.” Last night, Lauryn Hill and YG Marley played Fallon together.