It's hard to believe it was four years ago that Perrie Edwards, Jade Thirlwall, Jesy Nelson and Leigh-Anne Pinnock first formed on the eighth series of the ITV talent show back in 2011.
How time flies!
Little Mix - mentored by former judge Tulisa - became the first and only group to win the competition when they triumphed over Marcus Collins and Amelia Lily in the final. But unlike some of the show's previous winners who have, um, faded into obscurity, these girls set out to take over the world.
AND THEY DID IT!
They have sold millions of records, released three studio albums and ten singles which have charted all over the world, including most recent track 'Black Magic', which is celebrating a third week at the top of the British chart!
And they didn't stop there!
Unlike many artists from the UK, they've managed to crack the tricky and lucrative US market, winning over fans, making celebrity friends (hello Taylor Swift!) and breaking records. Their album DNA is the highest charting debut album from a British girl group, beating a record previously held by the Spice Girls.
They cemented their US domination with an a-mazing performance at the Teen Choice Awards over the weekend, where they picked up their first-ever American award for 'Breakout Artist'. They also joined Taylor Swift on stage at her California concert. No biggie!
Away from the charts and stage, they've also become known as a charitable and generous group, lending their time to many non-profit organisations and raising awareness for poverty relief and anti-bullying campaigns. They've performed on Children In Need and Sport Relief, and last year they visited Liberia to see how proceeds raised by Sport Relief were being spent.
In 2014, the girls joined anti-bullying campaign The Big March, which called on the European Commission to improve commitments to anti-bullying projects.
How amazing are Little Mix?! No wonder their loyal fans have been trending #4YearsofLittleMix all day!
Congrats on a mega successful year girls! And here is hoping there are many, many more to come!
their individual and joint talent forever inspires me. they know each other's strengths, they make sure everyone shines. #4YearsOfLittleMix— mulan menna (@crisspayne) August 19, 2015
i'm so thankful for all the girls have done for both me & my fellow mixers their smiles lighten up even my darkest days #4YearsOfLittleMix— alex (@perriedahling) August 19, 2015