This show features a star-studded US vs UK line-up as Hollywood comic legend Will Ferrell goes head-to-head with David Walliams and Louis Walsh; with appearances from Robbie Williams, Britney Spears and Paul O'Grady. One Direction deliver the popular maths song. There are new rounds and challenges, while the celebrities show off their general knowledge in order to avoid singing out the show
| Name | Type | Role | |
|---|---|---|---|
| Paul O'Grady | Guest Star | ||
| Robbie Williams | Guest Star | ||
| One Direction | Guest Star | ||
| Britney Spears | Guest Star | ||
| Will Ferrell | Guest Star | ||
| David Walliams | Guest Star | ||
| Louis Walsh | Guest Star |