Inside InStyle Awards 2017 and the Week's Best Parties

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What makes one truly unforgettable party?

Is it good drinks? One stellar DJ? Plenty of red carpet fashion moments? To us, it's all about the guest list, which is why the InStyle Awards 2017 proved to be the hottest celebration of the week. On Monday evening, we gathered fashion's best to honor each of their accomplishments. Elle Fanning, Brie Larson, Zendaya, and more stars came together at L.A.'s Getty Center—also where Selena Gomez and Demi Lovato shared one epic camera-ready reunion. It was one spectacular evening, and if you haven't had enough, relive it all right here.

Later in the week, Bella Hadid and Lily Aldridge dressed to the nines for Bulgari's celebration of its New York City Fifth Avenue flagship. Isn't it always a party when Bella's there?

When it comes to Hollywood BFFs, some of our favorites are Eva Longoria and Victoria Beckham. The dynamic duo joined forces to celebrate go-to hairstylist Ken Paves and his new salon. Victoria's husband David popped in for a visit, and the married couple posed for one epic photo.

VIDEO: InStyle Awards: What's Your Favorite Boob Trend of the Year?

Karl Lagerfeld was also the guest of honor at several Manhattan events this week, drawing everyone from Lily-Rose Depp to Mariah Carey and Naomi Campbell. It doesn't get any more fabulous than that.

Scroll down to see the best parties of the week.

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Demi Lovato and Selena Gomez

Kevin Tachman

at the InStyle Awards 2017.

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Valentino Creative Director Pierpaolo Piccioli and InStyle Editor-in-Chief Laura Brown

Courtesy Owen Kolasinski/BFA.com

at a dinner in celebration of Pierpaolo Piccioli, InStyle Awards 2017 Designer of the Year honoree.

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Kate Hudson

Courtesy Owen Kolasinski/BFA.com

at a dinner in celebration of Pierpaolo Piccioli, InStyle Awards 2017 Designer of the Year honoree.

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Bella Hadid

James Devaney/Getty

at a cocktail party celebrating Bulgari's Fifth Avenue flagship store.

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Lily Aldridge

Astrid Stawiarz/Getty Images

at a cocktail party celebrating Bulgari's Fifth Avenue flagship store.

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Priyanka Chopra, Karlie Kloss, Fergie, and Kate Hudson

Courtesy Bumble

at a party celebrating Bumble Bizz.

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David and Victoria Beckham

Frazer Harrison/Getty Images

at the grand opening of the new Ken Paves Salon.

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Eva Longoria, Ken Paves, and Victoria Beckham

Frazer Harrison/Getty Images

at the grand opening of the new Ken Paves Salon.

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Chelsea Leyland and Harley Viera-Newton

Courtesy Valentino

at a party celebrating VLTN's pop-ups.

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Julianne Moore

Dimitrios Kambouris/Getty Images

at a dinner in celebration of John Hardy.

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Lily-Rose Depp and Karl Lagerfeld

Gonzalo Marroquin/Getty Images

at the 2017 WWD Honors celebration.

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Hari Nef

Jamie McCarthy/Getty Images

at the 2017 WWD Honors celebration.

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Anna Ewers

Kevin Mazur/Getty

at the 2017 WWD Honors celebration.

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Joan Smalls, Gigi and Bella Hadid, and Kris Jenner

Kevin Mazur/Getty Images

at a dinner in celebration of Karl Lagerfeld.

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Mariah Carey and Naomi Campbell

Kevin Mazur/Getty Images

at a dinner in celebration of Karl Lagerfeld.

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Jordyn Woods

Sean Zanni/Getty Images

at a party celebrating 40 years of American Eagle at the new N.Y.C. AE Studio.

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Billie Lourd

Sean Zanni/Getty Images

at a party celebrating 40 years of American Eagle at the new N.Y.C. AE Studio.

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Joy Mangano and Iman

Monica Schipper/Getty Images

at a party celebrating Mangano's new book, Inventing Joy.

Replay gallery

Star-Studded: The Best Parties This Week