What has Rihanna’s ex done this time?

It seems Rhianna’s ex has been a bad boy…again.

R&B singer Chris Brown must stay in jail until a hearing next month after being kicked out of his rehab facility.

This violates the court order mandating he complete three months of treatment.

Los Angeles Superior Court Judge James R. Brandlin said he was troubled by comments that Brown made during his rehab stay in which the singer allegedly said he was good at using guns and knives.

The 24-year-old singer was arrested on Friday after he was dismissed from the Malibu facility where he was being treated for anger management and other issues.

Brown had been in rehab since November, when Mr Brandlin ordered him to receive treatment as part of his sentence for a 2009 attack on then-girlfriend Rihanna.

Brown’s attorney Mark Geragos asked that Brown be allowed to enter another rehab programme, but Mr Brandlin refused and set a probation violation hearing for April 23rd.