Learn how to make someone cry... boo-hoo.

Step 1
Open up a random photo of someone. I chose Jennifer Love Hewitt.

Cry Baby

Step 2
Now use the brush-tool to brush a black tear-shape on a new layer;

Cry Baby

Step 3
Finetune it and make it look very realistic;

Cry Baby

Step 4
Set the fill-amount to 0%

Cry Baby

Step 5
Add these blending-options;

Cry Baby

Step 6
And you're done...

Cry Baby