Loud, Rihanna's fifth studio album, is a significant change of pace from 2009's platinum Rated R. While much of Rated R was a cathartic and dark, Loud is relatively lighthearted and geared for dancefloors. It's led by the sleek, euphoric, and up-front "Only Girl (In the World)," produced by StarGate. The album also features collaborations with Timbaland, Taio Cruz, Alex da Kid, Drake, Sean Garrett, and Ne-Yo.