It seems like something is up!

Reese Witherspoon made her way through LAX while carrying son Tennessee yesterday, and actress went to great lengths to hide her mouth from the cameras. This is every celebrity's favorite trick for hiding a nasty herpes blister! Or maybe she just forgot to wax her mustache? We kid, we kid..

We bet the Oscar winner wouldn't even mind us poking innocent fun at her, because she's the first to admit she has a great sense of humor and knows how to have a good time! "I have to say I am a lot of fun to hang out with. People go, Youre really fun! And Im like, Was I not fun before? I like to have fun and I enjoy it, man. I would wanna sit next to me at an awards show! she recently told Entertainment Weekly.

We wish she had flashed us a smile!