"He was a talk show host and she was a mannequin who turned his world upside-down," a voiceover says.
Like the movie, Corden and his mannequin find love, but, the voiceover says, "Their love wasn't meant for this world."
Beckham says that she wants to be with her own kind and Corden takes her to his car and turns on the radio. "Spice Up Your Life" starts and the host and former Spice Girl sing along for Carpool Karaoke.
The designer announced that she would make an appearance on Carpool Karaoke on Wednesday in a snap chat video.
"We are here about to film 'Carpool Karaoke,'" she said from the set. "Where's James? There he is!"