Amanda was the more fashion-forward in her stylish halter-neck tuxedo top and skinny cigarette pants by Balenciaga.
She paired her designer ensemble with gold-accented stilettos, big-wave hair, and gold jewellery by TOTL.
Alesha worked a soft, feminine pink suit with fierce animal-print heels and a chunky gold necklace. A cream vest tucked into her trousers broke up the colour, and she kept her makeup clean and minimal.
David Walliams and Simon Cowell were also in attendance, but it was the girls who were turning all the heads.