Anna Kendrick continues to kill it on the late night show circuit following up her hilarious royal baby rant with an amazingly over-the-top Pitch Perfect-style riff-off on The Late Late Show with James Corden last night. Striding onstage and charmingly interrupting Corden at the end of the show's opening, Kendrick challenges the talk show host to defend his self-proclaimed status as "the best a cappella singer in town," because, as she boldly states, "this audience wants to see me kick your ass." Corden calls out a cappella group The Filharmonic before jumping into fantastically chosen themes: "See Ya Later Songs" like NSYNC's "Bye, Bye, Bye "followed by "Songs That Will Kill You" like Bell Biv DeVoe's "Poison" and Pat Benatar's "Love is a Battlefield." Did Kendrick ultimately claim victory? Watch and find out.