Here's proof that celebrities do dumb things. More cameras should be around them to capture these things. Ariana Grande was seen licking doughnuts in a shop, and she didn't even buy them. What the..?? That's gross!!

She licks the first one.

And then dares a friend to do it.

Then she moves over to lick another.

Then when a new tray comes out, the responds by saying this:

And then added that she hates Americans.

Watch the video below:

This is doughnut crime.