To ready for her role as Raikes in Battleship, Rihanna had to go through some tough military training. Check out the video below and look for the movie in theaters near you this spring 2012.

Music video by Rihanna performing Cheers (Drink To That). (C) 2011 The Island Def Jam Music Group

Music video by Rihanna performing Man Down. (C) 2011 The Island Def Jam Music Group

Music video by Rihanna performing S&M. (C) 2010 The Island Def Jam Music Group

Music video by Eminem performing Love The Way You Lie. © 2010 Aftermath Records