Messages which appeared out of character for each of the celebrities were posted on their Twitter feeds - leaving followers questioning if the accounts had been hacked.
Attracting widespread attention yesterday afternoon, Price's feed included messages relating to the global debt crisis.
"Great news about China's latest GDP figures!!" one tweet read, while another said: "OMG!! Eurozone debt problems can only be properly solved by true fiscal union!!! #comeonguys".
The celebrities then reveal their involvement by tweeting a picture of themselves holding a Snickers, writing: "You're not you when you're hungry."
'Swagger Jagger' star Lloyd became involved this afternoon, apparently outing herself as a fan of Russian literature, claiming: "Pushkin Rocks!! These Russians are *so* gloomy!! LOL!!!"
Others to have taken part in the campaign - which has been criticised by various commentators - include boxer Amir Khan and Ian Botham.
> Katie Price, Amy Willerton don catsuits to celebrate signing: Pictures