Chris Noth
Forgetting something, Mr. Big? The former Sex and the City star stepped out in NYC with his jeans unzipped.
Liam Hemsworth
Looks like the Hunger Games hunk should have had some coffee before heading to his Good Morning America appearance.
Tara Reid
You're not alone, boys. The blond beauty was snapped sporting tight pants with her fly down at LAX.
Justin Bieber
Despite his open fly, the Biebs still looked adorable while posing for pics at the 2011 Grammy Awards.
Brad Pitt
The hunky actor must have forgotten he must button and zip his pants while promoting The Curious Case of Benjamin Button. Rookie mistake!
Robert Pattinson
Our favorite vamp forgot to zip his pants at a TimesTalk with David Cronenberg. Hey, at least K.Stew wasn't present!
Robert Downey Jr.
Even Iron Man himself can suffer from a wardrobe snafu! The handsome actor was caught with his fly down while posing on the red carpet at the Iron Man 3 world premiere.