Amy Lynn Bradley, aged 23, disappeared mysteriously in March 1998 during a Caribbean cruise on the Royal Caribbean International ship Rhapsody of the Seas. She was last seen asleep on the balcony of her family's cabin early in the morning on March 24, 1998. Within a short time after her father last saw her, she was gone without any trace. Despite extensive search efforts by authorities, no definitive clues about her disappearance emerged, and her whereabouts remain unknown. There are multiple theories about what happened to Amy Bradley:

• It was initially speculated that she might have fallen overboard, but key facts about the ship and the timing of the search (the ship was docked in port) suggest that if she had been in the water, she would have likely been found.
• Other theories propose she was kidnapped or became a victim of human trafficking. Over the years, there have been claimed sightings of her in locations such as Curaçao, Barbados, San Francisco, and Puerto Rico, though none have been conclusively verified.
• Some witnesses reported seeing her with a man named Alister Douglas (also known as "Yellow") on the ship shortly before she vanished.
• The sliding door to her balcony was found ajar, leaving open the possibility that she left voluntarily or was taken against her will.

Her family has been persistent in seeking answers, offering significant rewards for information leading to her safe return or her current location. Renewed public interest was sparked by a three-part documentary series "Amy Bradley Is Missing" released on Netflix in July 2025, which explores these theories and new evidence. Amy's brother, Brad Bradley, has also stated that the family has received thousands of new tips following the documentary, including a shocking claim from a man who said he purchased a woman he believes to be Amy from a brothel in the Caribbean. Additionally, there was a "verified sighting" claimed by a former Curaçao police officer as recently as 2016, which the family is still investigating. High-profile figures like Kim Kardashian have shown support for the family and their continued search for answers. In summary, Amy Bradley's disappearance remains an unresolved mystery with ongoing investigations and multiple theories, but no conclusive resolution to date.