This is an animated gif of Allison Harvard (aka Creepy Chan) showing a WTF / confused facial expression. She is an American model and an Internet celebrity that is well known as "Creepy Chan".
In 2005, (before she became a model), Ms Harvard gained Internet fame by becoming a meme on 4chan (hence her nickname "Creepy Chan").
This gif shows a clearly-bewildered Harvard. This could be used whenever somebody says something
that is strange or weird.