De'Mario Monte Thornton (born June 13, 1985), known as Raz-B, is an American singer and actor, He is a founding member of R&B boy band B2K.

Born in Cleveland, Ohio, Raz B was a creator and member of the group B2K as a teen. During his time in the group, B2K released their album, Pandemonium!, and performed on an accompanying tour. The group’s first feature film, You Got Served, was released in 2004, shortly before they announced their break-up.

Distributed through his own production company, RazBeatz Entertainment, Raz released his first single, Fire, in May 2007. Fire officially debuted on the Billboard charts (the week of 5/12/07). Landing a spot on the Hot R&B/Hip-Hop Singles Sales chart and debuting at #2, it also hit the Billboard Hot Singles Sales chart at #2.^[1] There was no promotion behind the single as it debuted, because Raz B was pushing his music on an independent level.

On March 19, 2010, Raz B released his first mixtape titled Boy 2 King. In 2011, Elayne Rivers, Raz B's longtime publicist, announced that he would be going on tour in China. Throughout the tour, Raz B performed shows in various parts of China.

On August 19, 2013, during a performance in Zhejiang province, Raz B tried to stop a fight in the audience and was hit in the face with a glass bottle. Initial reports were that he had fallen into a coma,^[2] but subsequent reports were that this was misinformation, labelled as a hoax,^[3][4] and that he would make a full recovery.