The singer reportedly smashed a dressing room window after being questioned about former girlfriend Rihanna on Tuesday (March 22).

Brown said sorry "If anybody who was startled in the office, or anybody who was offended I'm disappointed in the way I acted - I got very emotional."

He added: "I felt like, 'OK, they told us this just so they can get us on the show so they can exploit me. I kept my composure and did my performances, and when I got back, I just let off, like, steam in the back."

Brown was convicted of assaulting Rihanna following an incident shortly before the 2009 Grammy Awards in Los Angeles.

Meanwhile, Rihanna has said that former boyfriend Chris Brown's assault had some positive outcomes.

(by Holly Frith)