You usually get a variance of these looks, the smooshed face, stuck lips, glazed expression and annoyed look.
The "I hope for you sake that's not a camera" glare
The "Huuuuh?? Whaaa....? What's going on, where am I?"
The "You're lucky I'm too tired to give you a piece of my mind"
The "awww, come on Mum, give it a rest"