Chris Brown is about to catch a beatdown, Brooklyn style.

Jay-Z has “hit the roof” over allegations that his mentee Rihanna was physical assaulted by boyfriend Chris Brown in Los Angeles last weekend.

Jay-Z, who discovered the singing island beauty, is reportedly enraged over the abuse allegations and has warned Chris that retribution is one the way.

“He hit the roof. Chris is a walking dead man. He messed with the wrong crew,” a source tells Us Weekly Magazine.