It's a Rihanna sandwich.

Rihanna hobknobbed with the A-list likes of director Steven Spielberg and rock singer Sheryl Crow at the annual 'An Unforgettable Evening,' which benefits EIF's Women's Cancer Research Fund. RiRi was on hand for the event on April 18 in Beverly Hills to support a good cause and posed for a photo opp with two luminaries.

With RiRi's film debut in the big-budget actioner 'Battleship' on the horizon, rubbing elbows with a legend of the cinematic medium like Spielberg is always a good idea, career-wise. Crow is a breast cancer survivor and it would be incredible if she and Rihanna collaborated somehow, some way in the future. They could make two very different genres collide in a believable way.

Most importantly, Rihanna was out and about for a very important and critical event that supports women.

She looked sublimely beautiful with dark, black hair, crimson-painted lips and her striped navy blue top and skirt with a slit up-to-there, complete with a chunky gold statement necklace. Leave it to RiRi to show a little skin no matter where she goes. But it was tasteful and she didn't overdo it. She was sexy and serious.

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