It was the war of the abs as Emma Watson and Jessie J led the fash pack at the GQ Men Of The Year Awards on Tuesday night.

Former 'Harry Potter' star Emma looked to have taken style inspiration from Lady Gaga with her unusual fashion choice at the swanky event held at London's Royal Opera House.

emma watson

Emma seemed to have taken style inspiration from Lady Gaga

She showed off her toned stomach with her flesh-flashing white top, and black trousers.

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But her impressive set of abs weren't the only ones on the red carpet, as Jessie J went for a revealing black boob tube and trailing skirt.

jessie j

Jessie J also bared her gym-honed physique

The pair joined by the likes of Russell Brand, Rita Ora, Matt Smith, David Gandy and Eddie Redmayne at the bash, which celebrates the men of TV, film, music, books, art and politics.

See more pics from the event in our gallery below...

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  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Rita Ora (L) and Jessie J arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Russell Brand attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Tim P. Whitby/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Russell Brand arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Russell Brand (L) and Noel Gallagher arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Russell Brand (L) and Noel Gallagher arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Rita Ora (L) and Jessie J arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Louise Redknapp (L) and Jamie Redknapp arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Daisy Lowe (L) and Alexa Chung arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: (L to R) Noel Gallagher, Rita Ora and Russell Brand arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: (L to R) Noel Gallagher, Rita Ora and Russell Brand arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Rita Ora (L) and Noel Gallagher arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: (L to R) Guest, Tom Odell, Alexa Chung and Rick Edwards arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Noel Gallagher (L) and Rita Ora arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jessie J attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Tim P. Whitby/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jessie J attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Mike Marsland/WireImage)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jessie J arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jessie J arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jessie J arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Noel Gallagher (L) and Jamie Redknapp arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jamie Redknapp (L) and Noel Gallagher arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Noel Gallagher (L) arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: (L to R) Pharrell Williams, guest, Sara Macdonald and Noel Gallagher arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Amir Khan (L) arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Rita Ora arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Rita Ora arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Rita Ora attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Mike Marsland/WireImage)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Rita Ora attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Mike Marsland/WireImage)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Nick Grimshaw arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Dan Stevens arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Piers Morgan (L) and Celia Walden arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Dan Stevens arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Claudia Winkleman attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Tim P. Whitby/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Claudia Winkleman attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Tim P. Whitby/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Claudia Winkleman attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Tim P. Whitby/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Sophie Dahl attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Tim P. Whitby/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Nancy Dell'Olio arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jordan Dunn attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Mike Marsland/WireImage)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jourdan Dunn arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Daisy Lowe attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Mike Marsland/WireImage)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Jourdan Dunn arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Daisy Lowe arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Daisy Lowe attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Mike Marsland/WireImage)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Alexa Chung (L) and Matt Smith arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Alexa Chung (L) and Matt Smith arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Alexa Chung arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Red Carpet Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Alexa Chung attends the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by Mike Marsland/WireImage)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Sally Wood (L) and Ronnie Wood arrive at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Pharrell Williams (R) arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Pharrell Williams (R) arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Tom Ford arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

  • GQ Men Of The Year Awards - Inside Arrivals

    LONDON, ENGLAND - SEPTEMBER 03: Louise Redknapp arrives at the GQ Men of the Year awards at The Royal Opera House on September 3, 2013 in London, England. (Photo by David M. Benett/Getty Images)

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