“Brian had that mysterious sense of musical genius that made his songs so achingly special. The notes he heard in his head and passed to us were simple and brilliant at the same time. I loved him, and was privileged to be around his bright shining light for a little while. How we will continue without Brian Wilson, ‘God Only Knows.’”

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

Brian Wilson and his family were open about his health, from his needing a conservatorship for his dementia to his battle with substance use.

The death of the poet laureate of adolescent heartbreak was announced by his family on Wednesday: “We are at a loss for words right now.”

John Stamos, Nancy Sinatra and John Cusack were among the celebrities paying tribute to musician Brian Wilson after his death was announced Wednesday. Wilson's family announced the Beach Boys founder had died in an Instagram post on his account.

"This album never got finished and these tracks will live on my drive in obscurity, but they’re really great," Jonathan Wilson wrote.

“Brian Wilson was always so kind to me from the day I met him,” John said. “He sang ‘Someone Saved My Life Tonight’ at a tribute concert in 2003, and it was an extraordinary moment for me. I played on his solo records, he sang on my album, The Union, and even performed for my AIDS Foundation.