Lily Allen talks about her functioning third nipple

Lily Allen left the normally loquacious Keith Lemon speechless after she told him in detail about her third nipple.

The comic ITV host was interviewing the pop star as part of his new show Shopping With Keith Lemon, and brought up a rumour he'd heard about her body.

The British singer, 34, not only confirmed that she has a third nipple located underneath her left breast, she explained how it 'gets erect' and 'lactates'.

Lily did draw the line at showing off her rare body part, saying: "I'm not going to show you."

In the ITV2 show the pair whizz round the aisles of their local supermarket as Lily speaks candidly about her life and career.