TROUBLED Beach Boy Brian Wilson has been rocked by a new mental breakdown — and now friends fear the surf music legend will be locked away in a psych ward again!

“Everyone is desperately worried about Brian’s fragile mental state,” says a pal. “This is a big setback for him. Brian could harm himself, and that’s the last thing anyone wants!”

The 77-year-old creator of classic tunes Good Vibrations, God Only Knows and Wouldn’t It Be Nice admits he’s been “hearing voices” since taking psychedelic drugs decades ago and recently revealed he’s “struggling with stuff in my head and saying things I don’t mean — and I don’t know why.”

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