The songstress, 50, found fame in the iconic girl group alongside Mel C , 51, Emma Bunton , 50, Victoria Beckham , 51, and Geri Horner , 53, in 1996 before eventually splitting in 2001.
Bandmates Geri Horner , Mel B , Mel C , Emma Bunton and Victoria Beckham had been in talks for a series of concerts to celebrate three decades since the release of Wannabe.
Former This Morning presenter Willoughby was among the first to share a message after meeting friends for a boozy pub lunch at legendary London watering hole the Devonshire Arms.
The timing of Emma Bunton's intimate 50th birthday party couldn't have been worse for Victoria, landing as it did just five days after her son Brooklyn's allegations.
The couple cheered on their horse at the Heythrop Hunt Point-To-Point Steeplechases on Sunday, after celebrating her Spice Girl bandmate, Emma Bunton's 50th birthday.
Victoria Beckham spent the weekend partying with her Spice Girls bandmates, days after her son Brooklyn left her heartbroken with his bombshell statement.
The eternally youthful and youngest of the girl group, Baby Spice kicked off her celebrations live on Heart FM as she anchored their breakfast show in place of Amanda Holden.
Emma, who was nicknamed ' Baby Spice', shot to fame in the legendary girl group the Spice Girls along with Victoria Beckham, Geri Halliwell, Mel B and Melanie C.
Rita Ora made sure all eyes were on her in a Barbie pink glittering minidress and fur coat as she lead the stars at The Music Industry Trust Awards on Monday night.