Naomi Campbell has found herself in the news again and this time, it’s not over what she DID but rather what she DIDN’T do. The supermodel is reportedly behind in her taxes and Uncle Sam says it’s time for her to pay up!

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According to a report in the Detroit News, the IRS filed a $63,487 tax lien against Campbell on July 28 with the New York Registrar’s office. The address on the tax lien is the famed Carnegie Hall Tower skyscraper in New York City owned by the model. According to the lien, she owes taxes assessed in 2009.

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The lien was reportedly filed just days before Campbell testified at the war crimes trial of Liberian ex-president Charles Taylor. The model testified that she received "dirty-looking stones" after a dinner she attended with Taylor in September 1997 but said she was unsure if the stones were "blood diamonds."

Only one day after Mia Farrow all but called Naomi Campbell a liar in the "blood diamonds" trial, the former supermodel seemed not to have a care in the world as she went swimming in Porto Cervo, Italy on Tuesday, and RadarOnline.com has all the pictures for you.

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The volatile 40-year-old beauty looked sensational in her black two-piece swimsuit, showing off her luscious skin, long legs and round derriere.

Actress Mia Farrow, testifying in the war crimes trial of ex-Liberian ruler Charles Taylor in the Netherlands Monday, said that supermodel Naomi Campbell excitedly told her she'd been given "a huge diamond" by Taylor following a South African dinner party in September 1997, contradicting Campbell's testimony she'd been given "a few ... small dirty-looking stones" from an unknown sender.

PHOTOS: Naomi Campbell Testifies At War Crimes Trial In The Netherlands

As RadarOnline.com has previously reported, Campbell, 40, testified last week that following the dinner party hosted by Nelson Mandela, she'd been woken up in the middle of the night and given a pouch containing the stones by two men, who remained silent throughout the exchange. Campbell claimed that she didn’t know who sent her the stones.

On Monday, Farrow, 65, told the court a different version of the events, claiming that while she was eating breakfast with her children the next morning, Campbell bragged to her about the lavish gift -- and knew exactly where it came from.

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"She said that in the night she had been awakened, some men were knocking at the door, and they had been sent by Charles Taylor," Farrow said. "And they had given her a huge diamond."

Farrow, under cross examination, said she "didn't see the diamond or diamonds" and was strictly going by "what Naomi Campbell said," adding that the model was excited by the gift, and told her she was planning on donating it to charity.

Campbell testified that she gave the stones along to a friend who was connected to children's charity run by Mandela. The volatile supermodel did not want to testify before the war crimes tribunal, until officials last month threatened her with seven years behind bars for contempt of court if she refused.

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The stones -- commonly referred to in the news as a "blood diamonds" -- serve as proof that Taylor had been trading firearms to rebels in neighboring Sierra Leone during that country's civil war from 1991 to 2002, prosecutors said. In exchange, Taylor received the diamonds and other natural resources from the rebels.

Taylor, who's also accused of murder, rape, sexual enslavement and recruiting child soldiers, has plead not guilty to the 11 war crimes he stands accused of.

Supermodel Naomi Campbell testified in the Netherlands on Thursday that she had in fact been given some "dirty-looking stones" by ex-Liberian ruler Charles Taylor, who’s charged with 11 counts of war crimes, RadarOnline.com can report.

PHOTOS: Naomi Campbell Testifies At War Crimes Trial In The Netherlands

Campbell, according to prosecutors, received an uncut diamond from Taylor -- commonly referred to in the news as a "blood diamond" -- at a September 1997 dinner party in South Africa that was hosted by the country's former leader, Nelson Mandela. Actress Mia Farrow, who was also in attendance at the dinner, said that Taylor had indeed given Campbell the diamonds.

Nineties supermodel Naomi Campbell was subpoenaed by judges in Amsterdam Thursday to testify in the trial of ex-Liberian President Charles Taylor, who is charged with 11 counts of war crimes and crimes against humanity.

Campbell, according to prosecutors, received an uncut diamond from Taylor -- referred to in the media as a "blood diamond" -- at a 1997 South Africa party hosted by the country's former leader, Nelson Mandela.