Natalie Appleton: "I don't think I have got the strength"

The 31-year-old singer left the show, which is filmed in Australia, after learning she would face a fifth so-called Bushtucker Trial.

The celebrities are chosen by the viewers to pass trials in order to win food for the rest of the camp.

Last Friday singer Brian Harvey also quit as a contestant after he had a blazing row with Janet Street-Porter.

Row

Appleton has endured a torrid time during the programme, including a well-publicised row with Sophie Anderton.

An ITV spokeswoman said: "The celebrities can leave at any time.

"When they want to leave they have to say 'I'm a celebrity... get me out of here', which is what she (Natalie) cried today."

She added that Appleton would stay in Australia until the end of the show, which is due to run until 6 December.

Sex Pistol John Lydon walked out on the last series of the show, while former EastEnders actress Danniella Westbrook quit series two.

The fourth series of I'm A Celebrity... continues to be a success for ITV, with more than seven million people watching the programme on Saturday night.