Rihanna in Mark Fast dress in Hawaii

Rihanna is definitely enjoying her vacation in Hawaii! The singer was seen strolling along the beach in a bikini that she covered with a hot pink dress from Mark Fast’s Spring 2010 ready-to-wear collection.

Rihanna in Norma Kamali swimsuit in Hawaii

And yesterday she went swimming in a gunmetal swimsuit by Norma Kamali. Hot!