The formerly curvy star has been under fire for months for her ever-shrinking frame. But she looked thinner than ever as she took to the stage in a super-short sparkly silver dress that exposed her stick-like limbs and impossibly tiny waist.
Sadly, Nadine's big bouffant hairdo served only to highlight her lollipop shape by exaggerating the size of her head in contrast to her lanky frame.
But the 25-year-old, whose shape has dramatically changed since she moved to LA – notorious for its size-zero culture – continues to deny that she has an eating disorder.
Speaking earlier this year, she said: "I am 100 per cent fit and healthy and I am the right weight for my type of body. I am totally happy with my weight - I'm just doing a lot of running with my trainer back home in LA.
"When I get back to Derry I always enjoy a good fry-up that my mum makes. That's my big weakness.
"I eat too much chocolate as well. If I'm honest, I'm not a particularly healthy eater."
Nadine's single Insatiable is out 1 November 2010.
What do you think of Nadine's look? Do you think the star has lost too much weight?