"My Dad and Brian had a special relationship," Kevin Love wrote. "Brian often stayed with my parents when they lived in Emerald Bay. For a period of time, my dad was both his caretaker and bodyguard -- particularly during a period when Brian was struggling with mental health and substance abuse."

Brian Wilson, an eclectic genius whose sunny Beach Boys songs like "God Only Knows" and "Good Vibrations" helped define American pop music, has died.