Contributors
The partial list (some in order of appearance) of the celebrities who contributed comments to 20 to 1.
- David Campbell – Singer
- John-Michael Howson – Entertainment Reporter
- Guy Sebastian – Singer
- Todd Rixon – Former Dancer
- Billy Birmingham – Comedian
- Lochie Daddo – TV Presenter
- Ben Dark – TV Presenter
- Paul Harragon – The NRL Footy Show
- Peter Sterling – Nine Footy Commentator
- Bob Willis – Former English Cricket Captain
- Shane Crawford- Former AFL Player of the Hawthorn Hawks
- Ken Sutcliffe – Sports Presenter
- Catriona Rowntree – TV Presenter
- Megan Gale – Supermodel
- Bianca Dye – Radio Presenter
- Wendy Harmer – Radio Presenter
- Prue MacSween – Media Commentator
- Eddie McGuire – TV Presenter
- Ita Buttrose – Journalist and Author
- Richard Wilkins – TV Presenter
- John Burgess – Former Game Show Host
- Peter FitzSimons – Author/Journalist
- Tracy Grimshaw – TV Presenter
- Brodie Harper – TV Presenter
- Sam Newman – The AFL Footy Show
- Matthew Johns – The NRL Footy Show
- Amanda Keller – TV and Radio Presenter
- Harry M. Miller – Personal Management
- Livinia Nixon – TV Presenter
- Jessica Rowe – Seven News presenter
- David Hasselhoff – American Actor
- Ed Phillips – TV Presenter
- Peter Garrett – Singer/Politician
- Donny Osmond – Singer
- Ronan Keating – Singer
- Anthony Callea – Singer
- Georgie Gardner – News presenter
- Tony Martin – Radio Presenter
- Peter Berner – TV and Radio Presenter
- Danny Bonaduce – TV and Radio Host
- Kenny Smyth – Film Character
- Mark Ferguson – Seven News presenter
- Imogen Bailey – Actress and Model
- Josh Lawson – Actor
- "Weird Al" Yankovic – Singer
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- Cameron Daddo – Actor
- Toni Pearen – TV Presenter
- Gorgi Coghlan – TV Presenter
- Lisa Wilkinson – TV Presenter
- Scott Cam – TV Presenter
- Kate Ceberano – Singer
- Mikey Robbins – TV and Radio Presenter, comedian
- Charles "Bud" Tingwell – Actor and Previous Host of 20 to 1
- Peter Thompson – Film Reviewer
- Tom Burlinson – Actor and Singer
- Tara Moss – Author and Model
- John Jarratt – Actor
- Lorraine Bayly – Actress
- Bill Collins – Movie Reviewer
- Deni Hines – Singer
- Shannon Noll – Singer
- The Umbilical Brothers (David Collins and Shane Dundas) – Comedy Duo
- Liz Ellis – Retired Netball Player
- Nikki Webster – Singer/Performer
- Duncan Armstrong – Olympic Athlete
- Colin Lane – Comedian
- Zoe Naylor – Actress
- Ricki-Lee Coulter – Singer
- Kristian Schmid – Actor
- Brendan Jones – Radio Presenter
- Tim Ferguson – Comedian
- Michala Banas – Actress and Singer
- Jessica Napier – Actress
- Damian Walshe-Howling – Actor
- Lizzy Lovette – Radio announcer
- Anh Do – Comedian
- Sami Lukis – Radio announcer
- Blair McDonough – Reality TV Star / Actor
- Ash & Luttsy – Radio Personalities
- Paul Vautin – The NRL Footy Show
- Paulini Curuenavuli – Singer
- Jessica Tovey – Actress
- Tania Zaetta – Actress
- Jay Laga'aia – Actor / Play School presenter
- Simon Burke – Actor / Play School presenter
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- Sam Simmons – Triple J presenter and Comedian