T.I. surprised the Birthday Bash crowd when he brought out fellow ATLien Usher, who sang his hit single “Climax.” Check out Usher’s performance: RELATED: Kelly Rowland & Lil Wayne Perform ‘Motivation’ At Birthday Bash [VIDEO] Rick Ross Rocks Birthday Bash 17 [EXCLUSIVE] T.I. Brings Out Usher, Kelly Rowland, Nelly & More At Birthday Bash [EXCLUSIVE] […]