Watch Billie Eilish and Alicia Keys perform 'Ocean Eyes' together live.

Billie Eilish joined Late Late Show guest host Alicia Keys last night, to surprise her with a video of 12-year-old Billie covering Alicia's own song 'Fallin'', as well as perform a duet of Billie's song 'Ocean Eyes' together live.

Watch the interview and performance below, as well as a game of 'Taller Or Shorter'...