Last month she revealed that she has lost a huge two stone and dropped an impressive three dress sizes in just seven months, after giving birth to her son Hudson last year.
And it was time to step out and flaunt it for Katie Waissel on Monday night, as she headed to dinner at flashy eatery Nobu in London.
The former-X Factor contestant, 33, looked phenomenally lean as she headed to out, glammed up in a sparkling silver crop-top and matching pants.
Glistening: Katie Waissel was seen on Monday night as she headed to dinner at flashy eatery Nobu in London
The glittering ensemble showed off her taut frame, despite the chilly January climes.
She wore her brunette tresses loosely around her shoulders and applied a gentle layer of bronzer to round off her chic look.
Katie added a chunky white watch to the get-up as she gave the camera a twirl.
Last month, Katie shared incredible before and after snaps to Instagram, telling fans she now feels like she is the 'best version of herself'.
In a reflective post, Katie looked back on how far she has come in the last year after starting 2019 feeling 'completely inadequate, helpless and alone'.
Chic: The former-X Factor contestant, 33, looked phenomenally lean as she headed to out, glammed up in a sparkling silver crop-top and matching pants
'The best version of myself': Katie shared incredible before and after snaps to Instagram on Friday to highlight her two stone weight loss while reflecting on a difficult year
In her before and after pictures, the former X Factor star looked dramatically different, with the snaps highlighting the phenomenal change in her body over recent months.
Looking incredibly gym-honed, Katie flexed the muscles in her back and showcased her taut stomach while posing topless in her old maternity underwear.
Sharing a lengthy caption alongside her upload, Katie said: 'Kiss My Ass 2019 - As the New Year fast approaches, and I’m slowly beginning to jot down my 2020 goals, I can’t help but take a look back on the roller coaster year that I have just battled through.
'Not only did I begin this last year with a huge international move with my then four month old baby and dog, I spent my first ever Christmas as a new mum, which should have been incredibly exciting, overshadowed by the fact that I was a single mother and completely lost, and afraid of what that year ahead had in store.'
Feeling inspired: The former X Factor star's reflective post explained that she has now found her own 'identity, self worth and strength both inner and outer'