Mark Watson, Christopher Biggins, Robyn, Sam Duckworth (S21E09)

S21E01 Jessica Hynes, Joel Pott, Kimberly Stewart, Lethal Bizzle S21E02 Katy Brand, David Cross, Ryan Jarman, Jermaine Jackson S21E03 Dappy, Keith Chegwin, Tahita Bulmer, Rich Fulcher S21E04 Roy Stride, Bobby Davro, Kristen Schaal, Richard Fleeshman S21E05 Kevin Eldon, Patrick Wolf, Irwin Sparkes, Miquita Oliver S21E06 Vic Reeves, Myleene Klass, Matt Bowman, Mark Ronson S21E07 Kate Nash, Martin Freeman, Antony Costa and Mat Horne S21E08 Jon McClure, KT Tunstall, Lauren Laverne, Jeremy Edwards S21E09 Mark Watson, Christopher Biggins, Robyn, Sam Duckworth S21E10 Sophie Ellis Bextor, Yannis, Tim Minchin, James Lance S21E11 James Nesbitt, Joe Goddard, Chris O'Dowd, Dev Hynes S21E12 Jamelia, Moby, Dale Winton, David O'Doherty