While accepting the Female Star of the Year Award at the ShoWest Awards on March 18, 2010, part of Katherine Heigl's dress broke. She quickly recovered, thanks to host Billy Bush's help.
Whether they're hitting up the red carpet or are out and about in Hollywood, celebs look perfectly polished and are dressed to the 9's. Most of the time.
Every now and then, our favorite stars suffer an unfortunate wardrobe malfunction and exposed a little too much.
RELATED: See the Kardashians as Human Barbies
From accidental nip-slips, to seriously see-through clothes, click through the gallery to take a look at the most embarrassing celebrity wardrobe fails through the years.