Rihanna nyc dkms gala singer Cipriani Wall Street nyc dkms gala Cipriani Wall Street Eva Mendes

Rihanna and Eva Mendes looked effortlessly gorgeous at the 5th annual DKMS Gala at Cipriani Wall Street. Love RiRi's updo!

The annual event, aimed at finding relief for those suffering from leukemia, was emceed by Pharrell Williams and included a performance by Mary J. Blige.

See which Gossip Girl star shined on the red carpet ...after the jump.