“10” beauty Bo Derek is devastated over a freak motorcycle crash that claimed the life of her younger brother as he was en route to a Thanksgiving celebration with her and actor beau John Corbet near Santa Barbara, Calif.

Collin Johnson Collins, 47, of Long Beach, Calif. lost control of his motorcycle on a Los Angeles freeway Nov 22 at shortly after 6 p.m.

As he lay helpless on the highway, Collins was struck and pinned underneath an oncoming car. He suffered multiple traumatic injuries and was pronounced dead at the scene, according to L.A. County Coroner spokesman Capt. Ed Winter.

Derek, 50, remains in seclusion, but a longtime family friend told the ENQUIRER: “Bo is devastated. Collin was more than a brother to her. He was her best friend and her anchor. Her heart is shattered.”