Synopsis

A rap version of This Is Spinal Tap, CB4 stars Chris Rock as Albert, a wanna-be rap star who, along with two friends, is trying in vain to break into the business. When Albert is mistaken for an undercover cop by a thug named Murphy, he adopts the newly incarcerated Murphy's persona and christens his rap group CB4, after Murphy's cell-block address. Soon, the band is selling out concerts, attracting a nerdy documentary filmmaker (Chris Elliott).