The singer posted a shirtless picture on their Instagram account in an effort to empower their fans to not feel bad about indulging over the Christmas holidays.
Sam wrote: “Christmas time is upon us. This time of the year always triggers tricky body issues with me. I love me some mince pies and all the trimmings, and I always find I gain a bit of weight during this time.
“I’m writing this out to you all, but also writing this for myself. Let’s make sure we remind our bodies during this time that no matter what weight we are, we are deserving of love and acceptance.”
They added: “Let’s love our fluctuating bodies. Look in that mirror and shower that reflection with Christmas kindness. Be super soft. It’s an everyday struggle for me. You aren’t alone xx.”
The Grammy-winning star has been open about their battle with weight and body image issues in the past.
Sam came out as non-binary earlier this year, asking fans to use the pronouns “they/them”, and explaining they had come to the decision after spending “a lifetime of being at war” with their gender.
They also revealed they had at one time considered transitioning.
A person who identifies as non-binary does not define themselves exclusively as masculine or feminine, and often prefers they/them pronouns, rather than he/him or she/her.