There are a few easy ways to alter photos using editing software or even phone apps. When done badly it can be easy to spot: watch how the background curves.
Celebrity Instagrams photoshopped?
You can push in a waistline ...
...but sometimes the background curves.
Can you see what was done to this picture?
The doorway and the tiles curve to show that someone slimmed down Kim K's waist.
Beyoncé has been caught posting altered photos to her Instagram.
Do you see how her phone and wine glass dip are lopsided?
Do you see how the shelves behind this Miranda Kerr Instagram push in?
Here's another before and after of Kim Kardashian.
With a little more effort you can do it without the background changing. Photoshopping can be very subtle but can drastically change an image.More Photoshop fails:
Hey, where'd your armpit go, Kate Upton?
It appears this model has lost her hand ...
Something's fishy here ... and it's the fact that she suddenly doesn't have a hand.
Kim Kardashian before and after photo editing
Something seems a little imbalanced with this model...
Jessica Alba before and after Photoshop editing
Kristen Stewart's arm just disappears into her leg
Photoshop made this model lose a leg.
Looks like this Victoria's Secret model got "Cinderella Surgery" on her foot.
The magazine didn't seem to like Megan Fox's tattoo.
"The Sexiest Polo"only has room for one arm.
Left arms are overrated anyway.
Drew Barrymore doesn't look like herself with her Joker-esque smile, lack of hips, and lopsided breasts.
This Victoria's Secret model's midsection reveals torso elongation and body contortions.
Photo editors didn't try to make this model's waistline look realistic.