Chris Brown scores a historic milestone on Billboard ... beginning Oct. 14, 2006 “Deuces,” feat. Tyga and Kevin McCall, nine, Sept. 11, 2010 “Look at Me Now,” feat.

Tina Davis, Chris Brown’s ex-manager ... with the two releasing mixtapes that spawned hit records like “Deuces.” “[Tyga] was the only one that would stand right next to him and do videos ...