Nominees: Amy Adams, Blake Lively, Emily Blunt, Julia Roberts, Meryl Streep
Who will win: Amy Adams — she had two critically acclaimed films this year with strikingly different performances in each one. It's Amy Adams' year.
Who should win: Emily Blunt — The Girl on the Train showcased several sides of Ms. Blunt we haven't been given access to before. We were impressed when the film released in October and we're still moved.