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The judge oozed Hollywood glamour in her chic black dress as she took her seat for the last, semi-final of the competition.

Wearing her blonde tresses down in loose waves, the 44-year-old no doubt set pulses racing in the floaty look, which came complete with an entirely sheer skirt.

Adding a splash of colour to her ensemble thanks to a slick of red lipstick, the presenter held hands with her co-star Alesha Dixon, who also chose a thigh-baring number.

Amanda polished off her outfit with platform heels, before joining her fellow panellists Simon Cowell and David Walliams.

Hitmaker Alesha, 36, dazzled the crowd after choosing a contrasting look to her TV "wifey".

Her heavily embellished frock featured long sleeves and a cut-out pattern, and was worn with pale pink sandals.

Viewers alongside the famous four-some will tonight decide who the last two acts to make it through to the final will be.

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Among their options are Golden Buzzer act Calum Scott, karate kid Jesse-Jane McParland and sugary sweet girl group Misstasia.

Last night's show saw Isaac Waddington win the public over with his rendition of George Michael’s I Can’t Make You Love Me.

Meanwhile the judges picked The Neales over dancers Boyband, following an "incredibly close" vote.

Britain's Got Talent: The Results will air at 9.30pm on ITV.

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