Rihanna defies the odds in the "Sledgehammer" music video.
Rihanna is an intergalactic space princess trapped on a desolate planet all by her lonesome in the new "Sledgehammer" music video.
Sia did Rihanna a solid when she handed over "Sledgehammer," a huge score for the Star Trek: Beyond soundtrack. In the newly-premiered music video, Rihanna is seen standing alone in flowy gown as the stellar winds whirl space dust around her. When Ri isn't defying gravity with her supernatural powers, the vid features clips from the upcoming movie.