Lily Allen
Singer Lily Allen on stage during a memorial for murdered Labour MP Jo Cox at Trafalgar Square on June 22 in LondonGetty

Pop star Lily Allen has urged the UK to "stamp out this stupid horrible ignorance" after she was shunned by a taxi. Taking to Twitter the 31-year-old singer recalled the moment a black cab driver refused her business telling her to 'find an immigrant to drive you'.

"Just tried to get in a black cab with my kids. The driver looked at me and said, 'find an immigrant to drive you you stupid tart, "she told her 5.8m followers.

"There is so much work to be done. But we can do it. Let's stamp out this stupid horrible ignorance together. #takeourcountryback."

But news of her alleged misfortune failed to get the response that she expected. With many fans questioning whether she was actually refused entry.

When one Twitter user questioned whether the incident really happened and urged her to share the car's registration and plate number as proof, she fired back: " I had both my hands full with children, couldn't get to my phone fast enough."

The alleged incident comes after she apologised "on behalf of Britain" for treatment of child refugees in Calais in a clip that aired on the BBC's Victoria Derbyshire programme captured in the French migrant camp known as 'The Jungle'. She broke down in tears as she spoke to a 13-year-old at the camp on the edge of the northern French port.

"It just seems that at three different intervals in this young boy's life, the English in particular have put you in danger," she said. "We've bombed your country, put you in the hands of the Taliban and now put you in danger of risking your life to get into our country.

She added: "I apologise on behalf of my country. I'm sorry for what we have put you through."