Gillian Anderson, Lorraine Kelly and Olivia Colman are just a few of the celebs who have shown support for Avon's campaign to raise awareness of domestic violence, by posting a 'Shhh' selfie with fingers on lips - a reference to how many victims are afraid to speak out - and now it's your turn. For every selfie posted with the hashtag #wallofsilence until December 16, Avon will donate £1, with the total to be split between Women's Aid and Refuge.