The James Bond singer kept the weight off for some years, but hit a bump in the road in 2016.
Speaking to Billboard in 2017, Sam revealed: “After the Oscars, I started going out too much, not respecting myself, drinking loads and smoking.
“I wasn’t looking after myself; I was going into a bit of a spiral. I’d lost contact with friends, with family. It wasn’t good.”
However, Sam hit the gym again three times a week with a PT, doing a mix of cardio and weight training.