The Smile singer took to her Twitter page to share her concerns about her trip home on the Eurostar from Paris Fashion Week.
She wrote: 'Oh god, foreign office have put people travelling to France on high terror alert!!! I'm in Paris already. Scared being here but scared to get on the Eurostar home.'
The 25 year-old added: 'Come to think of it, the day before yesterday there was this weird guy balancing a small bottle of something on his knee - he was sat next to me at a taxi rank. I thought he was being strange so I snuck a picture.
'I hope I'm just being a mad paranoid pregnant lady and that he wasn't a terrorist about to unleash deathly virus.'