"It makes me blush. I feel really embarrassed when I see that. Only when things like that happen do you kinda come into consciousness that what you're doing is impactful and it's reaching a lot of people. I wish that right now I could dress as one of my characters - that might be weird." Mum-to-be Zoe Saldana on fans dressing up as her colourful big screen characters in Avatar and The Guardians of the Galaxy for Halloween.