James welcomes Mariah Carey Christmas Takeover (Night 3), comedy with the cast of CATS, featuring Taylor Swift, Jennifer Hudson, Rebel Wilson, Jason Derulo, and Francesca Hayward, plus composer Andrew Lloyd Webber and director Tom Hooper, and Carpool Karaoke with Billie Eilish.
| Name | Type | Role | |
|---|---|---|---|
| Rebel Wilson | Guest Star | ||
| Mariah Carey | Guest Star | ||
| Jason Derulo | Guest Star | ||
| Billie Eilish | Guest Star | ||
| Francesca Hayward | Guest Star | ||
| Taylor Swift | Guest Star | ||
| Jennifer Hudson | Guest Star |