The prime minister's wife Rosmah Mansor allegedly spent US$6 million on clothes, shoes and jewellery, claims The Wall Street Journal (WSJ).
The report said the spending, made between 2008 and 2015, was based on new documents reviewed by the WSJ.
"Newly revealed documents show (Rosmah) has racked up at least US$6 million in credit card charges in recent years - despite having no known source of income beyond her husband’s salary.
"She is the only child of schoolteachers, hasn’t had a regular paying job in years and her husband, Prime Minister Najib Abdul Razak, is a longtime bureaucrat with an annual salary of US$100,000," says the WSJ report.
It said the spending were made from London's Harrods department store to Saks Fifth Avenue of New York and elsewhere.
According to the WSJ, the latest US$6 million expenses include the close to US$1 million spending by Rosmah, which it previously reported.
In March this year, WSJ reported that Rosmah spent €750,000 (RM4.091 million) at an Italian branch of Swiss-owned jewellery store De Grisogono and US$130,635 (RM534,297) at Chanel in Honolulu, Hawaii.
Charged to Najib's credit cards
In that report, the WSJ claimed the spending was charged to the credit cards of Rosmah's husband, Najib.
It claimed the credit cards drew on 1MDB funds.
The latest report highlighted Rosmah's biography on her source of funds for shopping.
“I have bought some jewellery and dresses with my own money. What is wrong with that?” it quoted Rosmah in her biography.
The report said Najib could not be reached for comment.
Malaysiakini has contacted Rosmah's aide Rizal Mansor for comment and is awaiting a response.
Meanwhile, Amanah Youth deputy chief Faiz Fadzil said Rosmah must come forward to clear her name - either by suing the WSJ, or through a Malaysian Anti-Corruption Commission (MACC) investigation.
Faiz said newly-minted MACC chief Dzulkifli Ahmad must deliver his promise to investigate each and every corruption case without fear or favour.
“1MDB funds are public money, and the MACC must fulfil its responsibility to the country and to the people (which are above) any interests of the people in power.
“The attorney-general must order for the 1MDB scandal to be re-investigated independently and comprehensively,” Faiz said in a statement today.