The 'Bad Boys' singer ditched her sexy style for a comfy, cosy and comical onesie.
Is it a teddy? A kangaroo? Pudsey Bear?! All we know is Alexandra's all-in-one is seriously cute. And it matches her hair!
The star shared the picture on Twitter with the caption, "I've joined the other side lol."
Alex isn't the only celeb to embrace a onesie this festive season - TOWIE's Bobby Norris and Miley Cyrus have both been rocking the look too.
We don't blame them - it's comfort all the way at Christmas!
What do you think of Alexandra's latest look? Tell us below, as the best comment from across the website each week wins £50!
Read more: Helen Flanagan road tests Louboutin boots on night out with friends
Read more: Taylor Swift reveals what she got for Christmas