Simply win the Turkish Grand Prix while driving as Lewis Hamilton. Because you must be driving as Hamilton, this can only be completed in the Grand Prix mode. You don't have to complete a full race weekend. I simply chose to do a 1 lap race on the easiest setting. After starting in 4th, I easily got around the other drivers after the first turn and just stayed there for the remainder of the lap. At the end of the race, the trophy will pop.