Rihanna Rocks 'Battleship'

"Rihanna rocks the boats" – that's one of the many rave reviews for Battleship, which has already premiered around the world at No. 1 in 24 foreign markets. The epic sci-fi naval thriller doesn't open in the U.S. until May 18, so we'll tide you over with an up-close look at the film's star on the set of the summer blockbuster. Watch the video, which includes Rihanna's candid home movies of her return to Barbados!

Video: Rihanna Admits to Nerves While Shooting First Film

ET's Mark Steines was exclusively with the Grammy winner on the USS Missouri in Pearl Harbor, HI, where she told him, "I want to take this acting in the movie world just as seriously as I take my music. I put everything into it just as equally as I do with my music because it's another project, it's another part of me, it's another part of my [creativity] that I enjoy."

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Based on Hasbro's classic naval combat game, the epic action-adventure unfolds across the seas, in the skies and over land as our planet fights for survival against an out-of-this-world, superior force. Rihanna plays Lt. Raikes, a crewmate and a weapons specialist on the USS John Paul Jones. She faces the enemy alongside John Carter star Taylor Kitsch, Alexander Skarsgård, Brooklyn Decker and Liam Neeson.