Diddy’s former personal assistant, David James, took the stand on Tuesday and delivered explosive claims about the rapper’s alleged drug-fuelled lifestyle and notorious “freak off” parties.

The former U.S. President Barack Obama was bizarrely mentioned in court testimony, though not as a participant, but in a shocking detail involving drug use, in the ongoing federal trial involving music mogul Sean “Diddy” Combs.

Diddy’s former personal assistant, David James, took the stand on Tuesday and delivered explosive claims about the rapper’s alleged drug-fuelled lifestyle and notorious “freak off” parties.

James alleged that A-list celebrities would consume party drugs such as Percocet and ecstasy during these events, according to Mail Online.

He testified that while Obama never attended these parties, some of the pills allegedly taken by guests were “in the shape of the former president’s face,” a bizarre detail that left courtroom attendees stunned.

James described Diddy’s alleged daily drug regimen, saying the rapper would “take copious amounts of drugs through the day,” and frequently carried a “medicine bag containing dozens of pills.”

“Some Advil, Tylenol,” James said. “He had water pills to help him lose weight, Viagra, pills that helped increase his sperm count.”

According to James, Diddy would use Percocet during the day and switch to ecstasy at night. He claimed he personally took ecstasy at one of the parties — an experience that allegedly led to blackmail.

He became emotional as he described the pressure of working under Diddy, revealing that he was often instructed to organise the infamous sexual “freak off” sessions.

He recounted that when he started working for Diddy, a Bad Boy Entertainment executive told him his role was to keep the mogul satisfied.

“I remember sitting at her desk and there was a picture of Mr. Combs on the wall,” James recalled. “She pointed at the wall and said this is Mr. Combs’ kingdom. We’re all here to serve him.”

James’s disturbing testimony comes amid mounting allegations against the Bad Boy Records founder, with other high-profile names being dragged into the spotlight.

Singer Usher was also dramatically named in court by Dawn Richards — a former Danity Kane member and ex-best friend of Cassie Ventura, Diddy’s former partner. Richards testified that Usher was present at a 2010 dinner where Diddy allegedly assaulted Cassie in a restaurant.

According to her testimony, the dinner included Diddy, Cassie, Usher, rapper Ne-Yo, and Interscope Records co-founder Jimmy Iovine. Richards claimed Diddy “punched Cassie in the stomach” after they moved to a separate room.

She added that she saw Cassie “immediately bend over” in pain and alleged “no one intervened,” though she did not confirm whether other attendees witnessed the altercation directly.

Richards further testified that on their way out of the restaurant, Diddy allegedly “grabbed her by the neck and popped her, slapped her in the mouth.”

She claimed the abuse was not an isolated incident.

“He would punch her, choke her, drag her, slap her in the mouth,” Richards said.

In a prior testimony last Friday, Richards alleged she once witnessed Diddy assault Cassie with a skillet of eggs in 2009, followed by chilling threats.