On Tuesday, Brown apparently wrecked a dressing room and alarmed office workers at ABC's New York City studios after being probed by interviewer Robin Roberts about his past troubles with ex-girlfriend Rihanna.
The 'Yeah 3x' musician later apologised for the incident during an appearance on BET's 106 & Park, saying: "First of all, I want to apologise to anybody who was startled in the [GMA] office, or anybody who was offended or... disappointed at my actions. Because I'm disappointed in the way I acted."
The New York Post's Page Six now reports that Brown's longtime spokesperson has chosen to step down from the post in the wake of this week's events.
Brook, who has also famously represented boxer Mike Tyson, has not yet been reached for comment on the matter.
In spite of any controversy, the singer's fourth studio LP F.A.M.E. is on track to top the Billboard 200 this week.
> 'GMA' addresses Chris Brown 'outburst' reports