Kissy Face (Noun) A face girls make when their picture is taken. Involves pursing the lips and sometimes tilting the head up. They think it makes them look sexy. 

Seriously, Kristen: If you don't stop it with the kissy face, your expression is going to freeze that way, and then where will your Hollywood career be?

Ah, who am I kidding? You'll get even more parts.

Here's Kristen in this month's UK FHM.