According to TMZ, Brown was pulled over in Reseda, California, at 12:20 p.m. PT for allegedly driving while talking on a cell phone. It's not known what substance police believe Brown had been using before getting behind the wheel, but law-enforcement sources told the website the singer was taken into custody at a Van Nuys jail and is awaiting bail.
As of press time, MTV News was awaiting comment from Brown's rep on the report.
Brown already has a DUI conviction on his record after pleading guilty to a 1996 arrest in Georgia. He served eight days in jail as a result of the charge.
In the days following Houston's death last month, Brown paid tribute to his ex onstage in Connecticut, telling an audience that he wanted to "give blessings to my ex-wife, Whitney Houston. I love you," before pointing toward the sky.
Those comments came just hours after Brown left Houston's funeral in Newark, New Jersey, where he had a disagreement with security inside the service. Brown would subsequently release a statement saying he was angered by security's insistence that he and his children repeatedly move seats and their refusal to let him see his and Houston's daughter, Bobbi Kristina.
Earlier this month, TMZ reported that Bobbi Kristina was contemplating changing her name "because of her association with her father" and wanted to now be known as Kristina Houston.