She has also been a panellist on ITV's Loose Women and Five's The Wright Stuff, and was a long-time presenter of the children's TV series You and Me.
[citation needed] In December 2018, Barnett surprised Gino D'Acampo as a guest Pizza Delivery lady in the Midnight Gameshow in the fourth series of Michael McIntyre's Big Show.
On 16 June 2007 Barnett presented her first radio programme on LBC 97.3, when she stood in for Chris Hawkins on Saturday afternoon.
The discussion attracted criticism of its accuracy and possible negative influence on public health by doctor and journalist Ben Goldacre, who described the show as "irresponsible, ill-informed, and ignorant".
Based on the inclusion of alternative viewpoints from those expressed by Barnett, namely callers that included medical professionals criticising Barnett's statements, Ofcom's final ruling was that the broadcast did not violate rules against misleading portrayals of factual matters or undue prominence to minority views and opinions on matters of political or industrial controversy.