Question: What is the name of this American television personality and musician, who is the best friend of Rob Dyrdek with whom he starred in a reality television series?
Sentence (from "Rob &amp; Big"): Rob & Big is an American reality television series that follows the lives of professional skateboarder, actor, producer Rob Dyrdek and his best friend and bodyguard Christopher "Big Black" Boykin.
Relevant evidence: Yes