Christmas is in full swing across the globe, and many of our favourite celebrities have been taking to social media to share their in the festivities.MORE: Prince William and Kate Middleton take George, Charlotte and Louis to Christmas Day church serviceFrom Victoria Beckham and Holly Willoughby to Gary Barlow and Mariah Carey here are some of our favourite celebrity Christmas snaps so far…Beauty mogul Victoria has shared a sweet family portrait to Instagram showing the family-of-six standing in