These days, when a celebrity puts his or her face in front of a camera, there are no secrets. But even the most carefully planned photo ops can go awry. From Angelina Jolie to Nicole Kidman, here are the most egregious beauty blunders of all time. As the Oscar-winning actress and screenwriter proved when she walked the red carpet at the Cannes Film Festival, even the best-laid plans for a beautiful face can go wrong.

Angelina Jolie, for example, looked stunning in a strapless black gown, but her make-up artist forgot to apply a bit of powder to her face, leaving her visibly ghostly on the red carpet. Nicole Kidman, who is known for her flawless skin, was just as unfortunate at the Cannes Film Festival.

The Australian actress was on the red carpet for the European premiere of her new movie, The Others when she made a bad decision with her makeup. She applied too much powder, leaving her face ghostly white. In Hollywood, stars know that the first thing people will see when they walk around the red carpet is their face.

The make-up artists, however, are often the first to forget about the face. Melissa Joan Hart, who played the title character in Sabrina The Teenage Witch, was a household name by the time her character was introduced to the public in 1997. But it wasn’t until she was working on the set of Sabrina that she realized her make-up artist hadn’t set her foundation correctly.