On Sunday (03Apr16), millions of files, known as the Panama Papers, were leaked online from the database of a Panama-based law firm Mossack Fonseca , exposing the financial records and offshore accounts of many public figures.

In the documents, it was revealed Cameron's late father Ian, who died in 2010, ran an offshore fund under the name Blairmore Holdings, and on Thursday (07Apr16) Cameron admitted in an interview that he had a profitable stake in the fund with his wife Samantha, but they sold it before he became Prime Minister in 2010.

Cameron insisted he paid his taxes, but singer Lily Allen blasted the politician for "stealing" on Twitter and called for his resignation.

"Our Prime Minister has been stealing from us. It's very important that he resigns," she wrote before joking that the scandal is being swept under the rug by news of Rob Kardashian and Blac Chyna's engagement on Monday night (04Apr16).

"The Panama Papers, biggest leak in history, off the scale corruption, worldwide, stuff revolutions are made of. Lets talk about Rob and Blac," she added.

She then got into an argument with a user on Twitter who defended Cameron, insisting he did not avoid tax or break the law. In a series of responses, she wrote, "it's not about legality, it's about ethics. He should be clamping down not taking advantage... in my eyes it is (stealing). And (U.K. Chancellor) George Osborne's, who said tax evaders should be treated as common thieves... come on this is Great Britian (sic), We leave the law making to the guys with the offshore trust funds."

She also used the hashtag #resigncameron and retweeted a poster advertising a planned protest outside Cameron's official residence of 10 Downing Street in London on Saturday (09Apr15).

When users implied she was also involved in such schemes, she replied, "none, no investments, I have an American bank account that I use when I'm touring there but I'm not interested in $ tbh (money to be honest)... And I could, I've been offered opportunities in schemes before I'm not that way inclined though."