OK, this is now officially the dubstep section of the album. Linking with ubiquitous dance-music star David Guetta, Rihanna veers dangerously close to straight-up bro-step sonic clichés here. Still, this song is a no-doubt hit, with easily digestible YOLO lyrics and Guetta's proven Euro-pop sheen. It's almost guaranteed to give dubstep its biggest chart success yet.
(Photos from left: Jamie McCarthy/Getty Images, Andreas Rentz/Getty Images)