When Heidi Montag walked into the Celebrity Big Brother house with her husband Spencer Pratt last night, we were shocked.

And it wasn't just because both of them seem utterly cuckoo, but we had forgotten just how much of a, errrrm, transformation Heidi has undergone since first appearing on 'The Hills' back in 2006 thanks to her love of surgery.

This is what she looked like before she had any procedures.

Unbelievably the star is just 26 and famously underwent 10 procedures in one day in her quest for perfection.

They included a boob job to increase her to a DDD, a nose job revision, chin reduction, bum implants, neck liposuction, fat injections in her cheeks, her ears pinned back, lipo on her waist, hips and thighs and a mini brow lift.

During an interview with People magazine in 2010, Heidi explained her addition to surgery.

"I was made fun of when I was younger, and so I had insecurities, especially after I moved to L.A. People said I had a 'Jay Leno chin'; they'd circle it on blogs and say nasty things. It bothered me," she said.

"And when I watched myself on The Hills, my ears would be sticking out like Dumbo! I just wanted to feel more confident and look in the mirror and be like, 'Whoa! That's me!' I was an ugly duckling before."

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• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Heidi Montag and Spencer Pratt enter the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Heidi Montag arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Heidi Montag arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• MTV's "The Hills Live: A Hollywood Ending" Finale - Arrivals

  HOLLYWOOD - JULY 13: Actor Spencer Pratt appear in costume across the street from MTV's 'The Hills' Live: A Hollywood Ending Finale at The Roosevelt Hotel on July 13, 2010 in Hollywood, California. (Photo by Frederick M. Brown/Getty Images)

• Celebrity Big Brother Launch - London

  Heidi Montag arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Heidi Montag and Spencer Pratt are sent to the Big Brother Basement at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Brian Dowling, Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Heidi Montag and Spencer Pratt arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Claire Richards, Brian Dowling, Neil "Razor" Ruddock, Frankie Dettori and Rylan Clark at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Neil "Razor" Ruddock arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Neil "Razor" Ruddock arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Neil Ruddock enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Neil Ruddock enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Neil Ruddock enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Lacey Banghard enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Claire Richards enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Claire Richards enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Rylan Clark enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Frankie Dettori enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Tricia Penrose enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Tricia Penrose enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Claire Richards arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Lacey Banghard, Brian Dowling and Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Lacey Banghard enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Lacey Banghard and Sam Robertson arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Samuel Robertson enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Sam Robertson and Lacey Banghard arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Samuel Robertson and Lacey Banghard enter the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Gillian Taylforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Gillian Taylforth enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Gillian Taylforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Brian Dowling and Gillian Tayforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Gillian Taylforth arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Gillian Taylforth enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Gillian Taylforth enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

• Celebrity Big Brother Launch - London

  Ryan Maloney arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Ryan Maloney arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Ryan Maloney arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother Launch - London

  Tricia Penrose arriving at the launch of Celebrity Big Brother 2013, Elstree Studios, Borehamwood.

• Celebrity Big Brother - Launch Night

  BOREHAMWOOD, ENGLAND - JANUARY 03: Tricia Penrose enters the Celebrity Big Brother House at Elstree Studios on January 3, 2013 in Borehamwood, England. (Photo by Tim Whitby/Getty Images)

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