James caps off 2016 with a Christmas edition of Carpool Karaoke featuring Mariah Carey, Adele, Lady Gaga and other guests throughout the year to sing Mariah's classic "All I Want for Christmas Is You."
| Name | Type | Role | |
|---|---|---|---|
| Gwen Stefani | Guest Star | Gwen Stefani | |
| Demi Lovato | Guest Star | Demi Lovato | |
| Anthony Kiedis | Guest Star | Anthony Kiedis | |
| Mariah Carey | Guest Star | ||
| Nick Jonas | Guest Star | Nick Jonas | |
| Flea | Guest Star | Flea | |
| Adele | Guest Star | ||
| Selena Gomez | Guest Star | Selena Gomez | |
| Chad Smith | Guest Star | Chad Smith | |
| Lady Gaga | Guest Star | ||
| Chris Martin | Guest Star | Chris Martin | |
| Elton John | Guest Star | Elton John |