Leigh-Anne Pinnock was three months pregnant while filming Celebrity Traitors, including a gruelling challenge in the chilly Scottish Highlands
The Little Mix singer helped retrieve heavy crates and treasure chests from freezing water as contestants competed to increase the prize fund
Her pregnancy was concealed beneath jumpers and jackets, and production reportedly did not know
Leigh-Anne is expecting her third child with footballer Andre Gray, having already welcomed twin daughters with him
She later revealed her pregnancy publicly in July, after keeping the news private during filming.