Geri, 52, shared throwbacks of herself and Mel - famously referred to as Sporty Spice - at various points throughout their pop career. Captioning the post, she wrote: 'Happy birthday!

Geri Horner left the internet in stiches after ... “Sent images to Pippa and this wording asked her to tweak where needed. “Happy birthday @officialmelb! Hope you have an amazing day!” ...

Mel B's Fellow Spice Girls Victoria Beckham, Melanie C and Emma Bunton Wish Her a Happy 49th Birthday David Beckham ... Wannabe': 'It's a Group Secret' Geri Halliwell on Her Iconic Spice Girls ...