Rihanna turns 21 today, and while the past few weeks have been incredibly hard, hopefully the support of her fans around the world can help her realize how loved she is on this landmark birthday. Today is especially bittersweet for Rihanna fans in light of the leaked photo of her currently under police investigation (that we are choosing not to post or link to). Instead, let's take a look back at some of Rihanna's remarkable career highlights since bursting onto the scene in 2005. Happy birthday, Rihanna! We're all rooting for you.