Adrian McManus, megastar Michael Jackson's maid in Neverland, has opened up about the "ugly" things she claims she witnessed behind closed doors at the children's fantasy park.

McManus, who was reportedly threatened with certain death if she breathed a word about the King of Pop's alleged pedophilia, has now "broken her silence" in an exclusive interview with 60 Minutes, having been too afraid to speak out in the past, the Toronto Sun reports.

“There was a kind side to him, and yet there was a dark side,” McManus said. “They told me if I ever came up on TV that they could hire a hitman to take me out, slice my neck, wouldn’t ever find my body.” The Smooth Criminal hitmaker, who tragically died in 2009, was allegedly seen "kissing and petting" young boys who visited Neverland. The 56-year-old maid, who began working for Jackson in 1990, claimed she saw disturbing things when she was handed the responsibility of maintaining the upkeep of his private living quarters.

She recalled fetching the pop star and children's underwear out of his jacuzzi and bath where he lounged with the kids. According to McManus, she often witnessed young boys walking around with "barely any clothes on" and said that the music legend once asked her to laminate photos of babies in the nude.

“There was a lot of Vaseline around Neverland, a lot in Michael’s bedroom,” she said. “And they had it all over in the main house, there was a rose room, it was up there. They had it in train room, which was kind of like an attic; they had that up there. It was in every room, the soldier room. It was in drawers. Sometimes it was on counters. Sometimes they would find it on the golf carts that Michael would take out to drive around.”

However, she claims what she saw in the jacuzzi was nerve-wracking. “Michael would have his underwear floating in the water and the little boys’ underwear floating in the water together," she said. “If they weren’t floating in the water, they were outside on the floor around the Jacuzzi. So I would find stuff like that. With all the little boys, he would hold their hands and kiss them. And they would fight for Michael’s love. It was a strange environment to watch.”

McManus also claimed the King of Pop had a massive collection of VHS cassettes that she believes contained “intimate” footage of himself and the children.

However, it is important to note that the one-time Neverland maid once sued Michael Jackson for wrongful termination and lost, owing him $1.5 million in court costs. She was also convicted of stealing property from the themed resort, owing $35,000 per a court order.