As we know, red carpet affairs require celebrities to go all out — glam gowns, sky-high heels, up-dos and all. But during their down time, celebs usually opt for comfort. Even the most decadent red carpet queens like Penelope Cruz, Reese Witherspoon, and newbie Leighton Meester can sometimes be seen sporting caps, flats, and hoodies. But the important question is: which look do you prefer on our Fab faves — dressed up or dressed down? Click through to cast your votes.