The Britain's Got Talent judge had barely an inch to pinch as she hit the BARRE Toned Studio launch party in London.
Amanda was showing her support for the new fitness craze, which is based on ballet and names Anne Hathaway, Drew Barrymore, and Kelly Osbourne as fans.
And if Amanda's slender figure is anything to go by, we need to sign up pronto!
The mother-of-two was more than happy to show off some skin as she paraded her pins in tailored shorts.
Please Amanda, tell us your secret!
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