Since she first broke onto the scene in the late '90s, Britney Spears has been a hitmaking machine. Spears' debut album, 1999's '...Baby One More Time,' yielded wildly successful singles like the title track and the ballad 'Sometimes.' Nowadays, the 'Till the World Ends' songstress is still busy churning out hits in her '30's off of albums like 'Femme Fatale.' So, out of every single Britney Spears album ever released, which one as a whole do you like best? Cast your vote below!