1Jennifer Aniston Joins, And Brings Her Friends Too
2Beyoncé's Pregnancy Announcement
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3The Kylie Jenner-beating Egg
Though social media can birth activists, memes, moments of change and more, it can also be ridiculous. Need we say anything more than 'Boaty McBoatface' or 'Salt Bae'? Well, we can also point to that time a photo of an egg became the most liked photo on Instagram (currently standing at 54.8 million) and all so it would beat the number of likes that a photo of Kylie Jenner's new baby daughter Stormi had amassed.
4Ellen DeGeneres' Oscar Selfie
While hosting the 2014 Oscars, DeGeneres brought in some famous friends for a photo including Jennifer Lawrence, Bradley Cooper, Brad Pitt, Lupita Nyong'o, Meryl Streep and Julia Roberts. The photo was one of the first mega-A-List selfies and became the most retweeted tweet on Twitter.
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5Celeste Barber
While some celebrities and influencers have used Instagram to showcase a polished, filtered and all-round unrealistic version of life, we also have a number of brilliant accounts mocking the artifice of it all. Take Celeste Barber, who boasts an eye-popping 7.3 million followers, which she cultivated by mimicking celebrities and models' Instagram content with her own, more candid, IRL versions.
6Meghan And Harry Leave Their Positions In The Royal Family
In 2020, anything can be done via Instagram, including making an announcement that you are, essentially, departing the royal family. Using their own platform, the Duke and Duchess of Sussex told their 10.7 million followers, and the world, of their decision to step back as senior royals, become financially independent from the monarchy and divide their time between the UK and US.
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7Jennifer Lopez Dons That Versace Dress... Again
8Grumpy Cat and Famous Pets
Instagram is undoubtedly responsible for the birth of the influencer. But, this doesn't just mean human influencers. The platform has also helped many animals climb to levels of fame we could only imagine. For example, Grumpy Cat - who sadly passed away last year - leaving behind a legion of fans including Aubrey Plaza. Other animal-focussed accounts like The Dogist (3.9 million followers), Esther The Wonder Pig and Blanco Bun have amassed huge followings too.
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9Body Positivity
Though Instagram has sometimes been criticised for promoting unrealistic and harmful attitudes when it comes to body image, the app also allows users to post their own, unfiltered content which has allowed movements like body positivity to flourish.
In 2017, Ashley Graham - who boasts 11.9 million followers - made the Forbes list of the highest-earning models for the first time. The new mother continues to use her platform to share photos of herself with stretch marks, cellulite and everything else women experience.
10Kim Kardashian Marries Kanye West
One of the world's most closely watched couples, known colloquially as Kimye, married in Italy in 2014 with this just-married photo of Kim wearing her Givenchy wedding dress against a backdrop of flowers becoming the most liked photo on the platform for a short while.
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11Memes, memes and more memes
12Humans Of New York
As well as the funny, there is also the heartwarming - such is the case of photojournalism project Humans Of New York. A simple yet powerful content model started by Brandon Stanton in 2010, the project has since gone beyond the Big Apple, travelling across the world for projects - several of which have raised money for charity. Stanton has also released books and featured famous faces including Serena Williams and Alexis Ohanian and Hillary Clinton.
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13Kylie Jenner's Met Gala Selfie
It's become tradition for Met Gala attendees to head to the bathroom of the Metropolitan Museum of Art for the annual toilet photo, given the event's reported protocol on phones and pictures. Jenner did so in 2017 with an epic group selfie which included her sisters Kendall and Kim, ASAP Rocky, Diddy, Brie Larson, Paris Jackson, Lily Aldridge and more.
14 Influencers
Influencers have emerged in every space: Fashion, beauty, food, activism and even housework. A new type of personal trainer was birthed with Instagram such as Kayla Itsines, who boasts 12.6 million followers.
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15Sir David Attenborough
Just before Instagram's 10th birthday, 94-year-old beloved conservationist Sir David Attenborough joined the platform in an effort to reach out to young people in his continuing fight to halt the devastating effects of climate change on our Earth and animals. After joining, Attenborough ended Aniston's reign of the fastest account to accumulate one million followers, reaching the milestone in four hours, 44 minutes.
16Blackout Tuesday
Following the death of George Floyd at the hands of a white police officer this summer, what originally started as a music industry-specific movement spread globally through Instagram. Users participated in Blackout Tuesday on July 7, agreeing to pause all social media content to give space to Black voices during a time of racial uprisings, anger and heartbreak over the deaths of Floyd as well as Breonna Taylor and Ahmaud Arbery.
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17Instagram Venues
As users posed with viral food and products, they also flocked to find the best backdrop. In every city and country, you can find them. An instantly recognisable location for a picture which you will have definitely seen on Instagram, for example the plush pink chairs and egg-shaped toilets of London's Sketch restaurant.
18Greta Thunberg
The young environmentalist has amassed 10.5 million followers with her school strike over climate change - which she does every Friday and shares a familiar picture of to her Instagram platform too.
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20Making Food For Instagram
From bubble waffles to cronuts to cookie sandwiches, food has become another huge success story of Instagram. Take Black Tap, the New York City burger and milkshake bar whose freakshakes are legendary on the platform. Did you even go to Black Tap if you didn't Instagram it? No.

Olivia Blair is Entertainment Editor (Luxury) at Hearst UK, working across ELLE, Esquire and Harper's Bazaar. Olivia covers all things entertainment and has interviewed the likes of Margot Robbie, Emma Stone, Michaela Coel and Ryan Gosling over the years.
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