Jennifer Aniston on the Set of Bounty

I realize these pictures were probably taken seconds apart from each other, but seriously, how long can a person hold the same exact stone face? I guess when you're afraid of aging, you can't smile or frown or move your face in fear of developing new wrinkles. She's like that friend we all have that has rotten teeth and has to put his hand over his mouth every time he laughs. Sorta. Ok, not really, nevermind.