During her first live performance since being announced as the talent show's deserving winner, lovely Louisa played homage to the 70s and went all out in this party-ready one-piece which boasted killer flares, a bandeau bodice and hundreds and hundreds of multicoloured sequins which gleamed under the lights.
Er, where can we get it?!
Stunning Louisa looked every inch the diva as she posed hand-on-hip for the starstruck paparazzi before following in the footsteps of X Factor runner up and Sax singer Fleur East as she teared up the stage with a breathtaking medley of hits.
The Forever Young songstress gave Victoria's Secret angels Gigi Hadid and Kendall Jenner a run for their money thanks to her seriously luxe locks which were parted at the centre and styled into glossy waves and she shot straight to the top of the style pile with lashings of grass green eyeshadow.
Louisa joined a string of pals at the star-studded event and took to Instagram to post a series of dressing room selfies, thanking fans for their huge support.
Gah, we love her!
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