The aim is simple; host Corden is presented with a song, photo and text message from one of the phones of a Huntsman: Winter's War cast member... and he must guess the owner of the phone, all while subtly promoting the movie. Behold the master at work - and Charlize Theron's stunning LBD.
If you're wondering why they all seem so jovial in light of the sad news of Prince's death, t'was all prerecorded. Here's James with a few words.