Looks like photographers caught Pamela Anderson off guard when she was leaving a houseparty in Beverly Hills last night.
Her black dress turned transparent in the flashlights, revealing that she wasn't wearing a bra, reports the Daily Mail.
The unforgiving camera flashes surprisingly got the better of Pamela, who has been under the spotlight for more than 20 years.
The 43-year-old Baywatch star realised her mistake only after happily posing for a couple of pictures.
Wide-eyed she then held an arm across her chest as she walked to her car.