Hey, I don't know for sure what's up with her, ..but this is not the Happy Kelly I've seen in hundreds of pictures.
There have been dozens of pics (paparazzi included) where they criticize her hair, style, clothes, and especially her weight...but she is ALWAYS happy, smiling, and comfortable in her own skin.
I've never seen her have any problem with paparazzi either...she is just nice all around.
Given that assessment, These pics (and this one in particular) look to me like she is thinking "I'm sweaty for some other reason than myself, and I could sure use a cheeseburger'.
Show me another Kelly photo where she looks as miserable as this....I'm just saying...she is always the one chick who is happy exactly how she is. Not happy in these pix.