There are at least three artists/groups with this name:

1. Jamal Phillips, also known as Mally G or just Jamal, is a rapper and music producer. He started his career as one‑half of rap duo, Illegal, the rap act formed by Dallas Austin in the early 1990s. He is considered an honorary member of the Def Squad.
2. A Polish ragga group. In 2005 they released their debut through EMI entitled Rewolucje. In 2008 their second album Urban Discotheque, was released. They combine themes from Dancehall, Modern Roots and Hip‑hop.
3. Jamal from X‑Factor Holland 2009. He became 3rd @ X‑Factor!