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KENDALL & KYLIE
We can't help but be inspired by the Jenner sisters. Not only are they gorgeous and can rock a crop top like no other, but they're also mega successful; Kendall has walked in countless high-fashion shows, while Kylie is taking the beauty industry by storm with her always-sold-out lip kits.
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GIGI & BELLA
It's only right to follow up Kendall and Kylie with their BFFs and fellow famous sisters, Gigi and Bella Hadid. Despite having hectic modeling schedules (the sisters have worked for Guess, Joe's Jeans and Maybelline, to name a handful of companies), the pair have made time to give back – specifically to organizations that are working to find a cure for Lyme Disease, an infectious disease that Bella, younger brother Anwar and mother Yolanda Foster all suffer from.
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KIM, KOURTNEY & KHLOé
Quite possibly the most famous trio of celebrity siblings, Kim, Kourtney and Khloé Kardashian have successfully transitioned from reality TV stars to full-fledged media moguls, with each sister honing their craft via their individual websites and apps. The launch of Kim's video game, Kim Kardashian: Hollywood, her book of selfies aptly titled Selfish, Khloé's workout and organization tips as well as her healthy living book Strong Looks Better Naked and Kourtney's slew of home décor inspiration (found on her app) have all proven to be successful.
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KATE & PIPPA
Keeping up with Kate and Pippa Middleton! All eyes were on the youngest Middleton sister long before Princess Kate wed Prince William in 2011, launching the Middleton family into the global spotlight. Aside from the obvious (ahem, Kate is the Duchess of Cambridge, after all), the world's fascination with the sisters can be credited to the pair's intelligence and eloquence, flawless genes and effortless, totally on-point fashion sense.
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SOLANGE & BEYONCé
Never has there been a sibling duo more (musically) in tune than Beyoncé and Solange Knowles. Solange has followed in her older sister's footsteps when it came to her musical career, releasing critically-acclaimed music – all while elevating her style game and providing outfit inspiration for the fashion-obsessed. As for Queen Bey, the Grammy winner continues to reign supreme in our hearts … as well as tease us with an upcoming album that is set to drop any day now.
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CARA & POPPY
Talk about model behavior! While Poppy and younger sister Cara Delevingne vary when it comes to style choices and personality, that doesn't mean they're not close. Cara, the edgier of the two model-sisters, swapped her rocker style for an airy dress when it came time to serve as bridesmaid for Poppy's 2014 wedding.
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MARY-KATE & ASHLEY
Best known for starring on Full House as babies/toddlers/tweens, Mary-Kate and Ashley Olsen have grown up to take the fashion industry by storm with their award-winning lines, Elizabeth amp James and The Row. Despite having acted for more than half their lives, the sisters have repeatedly voiced their hesitance about returning to entertainment, seeing as their passion remains in fashion – which is sad news for TV and movie buffs and really good news for fashionistas.
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ASHLEE & JESSICA
You know the saying: The sisters who go on double dates together stay close forever – and the same can be said for Ashlee and Jessica Simpson. Like many sisters, Ashlee and Jessica were complete opposites when it came to their musical sound; while Jessica conquered pop, Ashlee delved into an edgier sound. Today, the duo continue to work and make us 'aww' (every time) with their adorable family 'grams.
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HILARY & HAYLIE
When it comes to Hilary and Haylie Duff, no sibling pair can compare. The sisters have not only collaborated with each other on the big screen (Never forget Material Girls!), but the stars have also been remained super-supportive of each other through the years, whether it's attending events in one's honor, giving shout-outs on Instagram or launching their joint campaign to combat mom-on-mom bullying.
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WANT MORE BEAUTIES?
Head to PEOPLE's Snapchat Discover Channel, where we're bringing you all things Most Beautiful, from words to live by (straight from the mouths of our stunning squad) to our favorite no-makeup looks. See you there, gorgeous.