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While hanging out with brother-in-law Rob Kardashian in Beverly Hills, Lamar Odom showed off his new 'do ... freshly-shaved stars around the back of his head in memory of his cousin who died in a car accident back in NY.

Aside from the death of Lamar's cousin, the Lakers player and wife Khloe Kardashian have been grieving over the death of a 15-year-old NYC pedestrian who was killed after the car the couple were riding in struck a motorcycle ... that ultimately struck the teen.

See more photos of Lamar and Robert out in LA ... after the jump.