The 'Shout Out To My Ex' hitmakers - made up of Jesy Nelson, Leigh-Anne Pinnock, Jade Thirlwall and Perrie Edwards - were confirmed as the first headliners for London's huge outdoor concert series returning in 2020, and the 'Tik Tok' star has been added to the bill for July 4 alongside Rita Ora and Zara Larsson.
Following the official announcement, Kesha tweeted: ''UK ANIMALS!!! I'm so excited to head back next year on 4th of July for American Express presents @BSTHydePark (sic)''
In a press release, event organisers added: ''Now there will be even more girl power at BST Hyde Park, with special guests Rita Ora, Kesha and Zara Larsson added to the line up, plus more to be announced.
''This is a bill that celebrates female artists by putting them at the centre.''
In 2019, BST saw the likes of Celine Dion, Stevie Wonder and Barbara Steisand top the bill with their own exciting performances, while Florence + The Machine were joined by co headliners The National, while Robbie Williams also took to the stage at Hyde Park.
In the past, the event has hosted music icons with Carole King, Black Sabbath, Green Day, Kylie Minogue, The Who, Blur and Take That all amongst the huge names in the festival's history.
Each year, every headliner is also joined by a full supporting line-up across multiple stages, with major superstars and handpicked emerging artists all appearing together across a number of stages.
Tickets for Little Mix's show - priced from £65 plus booking fee - are now on sale at https://www.bst-hydepark.com/tickets/4-july-littlemix.
What's new in the music world this week?
LCD Soundsystem was released on this day (January 24) in 2005.
Watch three incredible live performances from Discovr.TV.
Don't miss the K-pop titans' return to Europe.
Listen to Alex Bayly performing 'Animal'.
Two weeks ahead of Independent Venue Week, Dry Cleaning made 'Britain's Best Small Venue 2015' (NME) the second port of call on their 2020 tour.