Graham is joined on the show by Cate Blanchett, Ewan McGregor, Michael Sheen and Matt Lucas.

Graham is joined on the show by Zac Efron, Matt LeBlanc and Lee Mack.

Graham is joined on the show by Matt LeBlanc, Zac Efron, Lee Mack and Marina and the Diamonds.

Graham is joined on the show by Jessie J and Simon Amstell.

Graham is joined on the show by Kristen Stewart, Chris Rock and Engelbert Humperdinck.

Graham is joined on the show by Will Smith, Gary Barlow and Tom Jones.

Graham is joined on the show by Cameron Diaz, Kathy Burke and The Scissor Sisters.

Graham is joined on the show by Jon Hamm, Charlize Theron and Steve Coogan.

Graham is joined on the show by Katy Perry, Ross Noble and Cheryl Cole.

Graham is joined on the show by Russell Brand, Emily Blunt and Rihanna.

Graham is joined on the show by Will.i.am, Miriam Margolyes, Greg Davies and Adam Lambert.

Graham is joined on the show by Danny DeVito, Charlotte Church, Rhod Gilbert and Fun.