Hollywood stars look strange because of Photoshop.

Images of Britney Spears from a photoshoot show that her legs, thighs, and waist have been digitally altered to make her body appear slimmer and smoother.

Kate Upton originally had a fuller figure and a curvier waistline, but when she appeared on magazine covers, she was "slimmed down" to look more slender.

Kim Kardashian's unedited photos reveal cellulite on her thighs and a larger waistline.

Lady Gaga on the cover of Vogue (right) looks completely different from the behind-the-scenes image from the photoshoot.

Ralph Lauren's representatives were forced to publicly apologize to model Filippa Hamilton for releasing a heavily photoshopped image of her. The image showed Filippa Hamilton looking unusually thin, a stark contrast to her stage performances.

Gwyneth Paltrow's left leg pose looks odd in the photoshoot by Terry Richardson.

In the unedited photo, Madonna reveals many wrinkles around her eyes and sagging skin on her chest.

Kate Moss and her daughter Lila Grace on the cover of Vogue 2011. However, Lila Grace became a victim of Photoshop when her right finger disappeared.

Jessica Alba had her waist and legs digitally altered to appear smaller in the advertising photos.

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