Brian Wilson, who as leader of the Beach Boys and a founder of California rock invented a massively successful pop sound full of harmonies and sunshine, has died at the age of 82.

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

Carnie Wilson, the Beach Boys, John Cusack, John Stamos, Elizabeth Banks, and more paid tribute to Brian Wilson following the 'God Only Knows' songwriter's death: 'The world mourns a genius today.'