Frockwatch: Katy Perry wears double denim to the VMA's.

By NICKY CHAMP

It’s been a huge week on the red carpet with the MTV Video Music Awards and the Emmys, but there was one outfit flashback we didn’t see coming.

Rather than going pantless a la Taylor Swift or pulling on a sleek, glittery silver frock a la Iggy Azalea or J-Lo, Katy Perry looked to Britney Spears for inspiration.

The 29-year-old turned up to the MTV Video Music Awards in a denim dress, her new love interest Riff Raff (real name Horst Christian Simco) was dressed in a matching Canadian tuxedo. Britney Spears and Justin Timberlake’s double denim moment at the 2001 American Music Awards has been etched into our fashion consciousness forever, and not in a good way. We thought there was no way we’d ever see this outfit on the red carpet again.

It had us questioning everything we ever thought was right in this world.

Take a look at the week in fashion here:

Cara Delevigne - sans shirt, with Kate Moss

Kim Kardashian

Rihanna, sans shirt

Paloma Faith

Megan Gale and Shaun Hampson

Julia Morris

Olivia Palermo

Alex Chung

Rita Ora

Keira Knightley

Kate Bosworth

Tina Fey

Reese Witherspoon

Jennifer Lopez

Anna Kendrick

Dakota Fanning

Jane Fonda

Keira Knightley

Oliva Palmero

Rihanna

Rose Byrne

Julianne Moore

Kendall Jenner

Poppy Delevigne

Cara Delevingne

Kim Kardashian

Jourdan Dunn

Rachel Finch

Ricki-Lee Coulter

Jodi Gordon

Sylvia Jeffreys

Olivia Palermo

Magdalena Roze

Kyly Clarke

Milla Jojovich

Rita Ora

Cameron Diaz

Natalie Dormer

Julie Bowen

Allison Williams

Cat Deeley

Julia Louis-Dreyfus

Kate Mara

Claire Danes

Sarah Silverman

Kristen Wiig

Mindy Kaling

Kate Walsh

Julia Roberts

Lizzy Caplan

Melissa McCarthy

Zooey Deschanel

Kim Kardashian

JLo

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Taylor Swift

Katy Perry

Beyonce

Riff Raff and Katy Perry

Gwen Stefani

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Pixie Lott

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Pixie Lott

And if you missed the Emmys red carpet this week, we’ve got every single frock here:

Julia Roberts in Elie Saab Couture (via Getty)

Zooey Deschanel in Oscar de la Renta

Sophia Vergara in Roberto Cavalli (via Getty)

Melissa McCarthy (via Getty)

Julia Louis-Dreyfus in Carolina Herrera

Christina Hendricks in Marchesa (via Getty)

Claire Danes in Givenchy (via Getty)

Kate Walsh in Stephane Rolland (via Getty)

Mindy Kaling in Kenzo

Kerry Washington in Prada (via Getty)

Ariel Winter in Black Halo Eve (via Getty)

Kristen Wiig in Vera Wang (via Getty)

Katherine Heigl (via Getty)

Sarah Hyland in Christian Siriano (via Getty)

Lena Dunham in Giambattista Valli (via Getty)

Julianne Hough in DSquared (via Getty)

Matthew McConaughey (R) and model Camila Alves (via Getty)

Gabourey Sidibe

Angela Bassett (via Getty)

Felicity Huffman

Michelle Dockery (via Getty)

Rose Leslie (via Getty)

Vanessa Williams

Kate Mara (via Getty)

Taryn Manning in Azarro (via Getty)

Sarah Silverman in Marni (via Getty)

Amy Poehler

Sarah Paulson in Armani Privé

Joanne Froggatt (via Getty)

Lucy Liu in Zac Posen (via Getty)

Cat Deeley in Burberry (via Getty)

Jon Hamm in Tom Ford and Jennifer Westfeldt in Marchessa (via Getty)

Padma Lakshmi

Allison Williams (via Getty)

Kaley Cuoco in Monique Lhuillier (via Getty)

Natasha Lyonne in Opening Ceremony (via Getty)

Teyonah Parris in Christian Siriano (via Getty)

January Jones in Prabal Gurung (via Getty)

Natalie Dormer in J. Mendel (via Getty)

Kit Harington (via Getty)

Sibel Kekilli from Game of Thrones (via Getty)

Julianna Margulies (R) and Keith Lieberthal (via Getty)

Natalie Dormer in J. Mendel (via Getty)

Lena Headey in Rubin Singer (via Getty)

Allison Janney in Nicolas Jebran (via Getty)

Anna Chlumsky in Zac Posen (via Getty)

Julie Bowen in Peter Som (via Getty)

Keke Palmer in Rubin Singer (via Getty)

Nikolaj Coster-Wood (via Getty)

Selenis Leyva (via Getty)

Minnie Driver (via Getty)

Betsy Brandt in Alice + Olivia (via Getty)

Taissa Farmiga (via Getty)

Octavia Spencer in Tadashi Shoji (via Getty)

Michelle Monaghan in Giambattista Valli Couture (via Getty)

Hayden Panettiere (via Getty)

Debra Messing in Angel Sanchez (via Getty)

Eric Stonestreet (via Getty)

Laura Prepon (via Getty)

Kate McKinnon (via Getty)

Justin Mikita (L) and actor Jesse Tyler Ferguson (via Getty)

Taylor Schilling in Zuhair Murad (via Getty)

Heidi Klum in Zac Posen (via Getty)

Amanda Peet (via Getty)

Guliana Rancic (via E! News)

Taylor Schilling (via Angela Bishop)

Who gets your vote for best dressed this week?

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The fashion flashback we didn't see coming…

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