Alesha Dixon wows in a thigh-skimming £2,515 mini dress for Britain's Got Talent's third live semi final

Alesha Dixon wowed as she stepped out on stage for Britain's Got Talent's third semi final on Wednesday wearing a draped Jaquemus dress, worth £2,515. 

The show judge, 45, put on a very leggy display as she wore a sequin-embellished taffeta mini dress. 

The garment featured a gathered off-the-shoulder neckline and ultra puffed sleeves. 

There was an extra hint of sparkle as the dress was adorned with delicate silver sequin flowers. 

Joining her fellow judges, Amanda Holden, Simon Cowell and Bruno Tonioli, she added inches to her statuesque frame and slipped into a pair of black strappy heels. 

Alesha exuded glamour as she walked out on to the glitzy stage with her brunette tresses slicked back into a sleek bun. 

To accessorise, she finished off her stunning ensemble with some trailing silver earrings. 

Her glitzy look comes hours after eagle-eyed BGT viewers were left puzzled over Alesha's choice of outfit during the second live semi-final of the series on Tuesday.

She walked out on stage in a burgundy one-shoulder fitted leather catsuit with her fellow judges.

As she took her seat behind the panellists' desk, fans of the show took to social media to question whether she was in fact wearing the same clothes Amanda had worn on the programme the evening before.

During Monday's first live semi-final, Amanda caught the eyes of BGT viewers as she wore a revealing claret red dress which looked very similar to Alesha's choice on Tuesday when the former Misteeq member was sat in her chair.

Taking to social media, one person asked: 'Is Alesha wearing the same dress that Amanda wore yesterday?'

Another person posted: 'Is Alesha wearing Amanda's dress from last night? Well it's good to recycle.'

'I spotted that. Hope Amanda wiped it down as she is awfully close to Simon,' replied one person.

While someone else shared: 'Hang on why is Alesha wearing Amanda’s outfit from yesterday?!'

During Monday's first live semi-final, Amanda caught the eyes of Britain's Got Talent viewers as she wore a revealing claret red dress.

The radio host joined her fellow judges - Alesha, Bruno Tonioli and Simon Cowell - but stood out as she chatted to hosts Ant McPartlin and Declan Donnelly during the opening minutes of the live episode.

Actress Amanda looked glamorous in her one-shoulder gown which featured sleeves with attached gloves.

The garment's material gathered to the front but it was for another reason that fans of the show focussed their attention on the dress - many took to social media to note that they could see her nipples through the material. 

They joked it must have been cold in London's Hammersmith Apollo where the semi-final was taking place. 

One person wrote on Twitter: 'Live shows baby!!! First live show and Amanda already has her nips out. Fantastic.'

While someone else joked: 'Amanda has a couple of things that are live.'

 'Shoutout to Amanda Holden's nipples.'

'Amanda smuggling peanuts again,' while one other show fan asked: 'Bit nippy Amanda?'

'Turn on the heating for Amanda. You could hang a painting off them.'

'I think Amanda Holden has a couple of points to prove tonight.'