Rihanna is the gold standard of fashion. The eight-time Grammy winner stunned in a jaw-dropping strapless metallic gown by Dior at the second annual Diamond Ball on Thursday held at Barker Hangar in Santa Monica, California for her Clara Lionel Foundation.

Her designer dress, which featured a thigh-high split and cinched bodice for ample cleavage, was perfectly accessorized with a matching long gold shawl and color coordinated high heels.

| 10 December ~ Diamond Ball in Los Angeles : Red Carpet | 1013 photo(s).

| 10 December ~ Diamond Ball in Los Angeles : Inside | 33 photo(s).

The black-tie event – hosted by comedian Kevin Hart – brought out Hollywood’s finest with guests including Will and Jada Pinkett Smith, Kylie Jenner and boyfriend Tyga, ZendayaEmily Ratajkowski as well as a performance by Lionel Richie.

Proceeds raised from the evening (tickets cost $3,000 and more per person) benefitted Rihanna’s Clara Lionel Foundation, which she launched in 2012 in honor of her grandparents, Claire and Lionel Braithwaite, and works to improve the quality of life for communities around the world.