Raz B only needs two things to get it popping on the "TMZ After Dark" tour ... a girlfriend and a Monster Energy drink.
The B2K rapper hosted our Saturday night tour this past weekend and he had our bus hyped, singing the boy band's throwback hits and sprinkling in some new jams as folks partied all over Hollywood.
Raz B belted out B2K's "Girlfriend" and previewed the band's upcoming reunion tour ... in between stops at Hollywood hot spots like Saddle Ranch, where everyone got hyped on Monster.