What is the name of Justin Bieber's road manager who failed his driving test three times?

Explanation

Justin is surrounded by a whole group of people who all do their utmost to ensure that everything around him works as it is supposed to. One person always close to him is his former body guard Kenny Hamilton, also known before as his "personal safety ninja". When Justin flunked his first driving test it emerged that Kenny had also flunked not once, but three times before finally succeeding in his fourth attempt. Kenny later got promoted to road manager.