Singer Ashley Roberts has fallen ill with tonsillitis.

The former Pussycat Dolls star recently spent three weeks living in the Australian jungle as part of British survival series I'm A Celebrity... Get Me Out of Here!, on which she came in second to U.K. soap actress Charlie Brooks - and it appears the Tv show's strenuous tasks have taken their toll on her health.

Taking to on Monday (17Dec12), she writes in a post, "Feeling sick... Doc says tonsillitis".

During the reality show, Roberts won an army of fans for braving challenges including sleeping in a coffin and jumping into a vat of slime to win food and treats for her camp, which included boxer David Haye, 1980s singer Limahl, and veteran British actor Colin Baker.