Former pop group Spice Girls are set to get back together to celebrate the British monarch's 60th year on the throne.
Mel B let slip the "top secret information" during an interview on Australian TV.
Asked if the group, consisting of Victoria Beckham, Emma Bunton, Mel C, Geri Halliwell and Mel B, were going to reform for the 2012 London Olympics, she said: "I think the Queen's Jubilee concert is the event I'd be looking at more closely for that to happen."
However, she quickly changed the subject after realising she had made the omission and after the show she admitted it was all "top-secret" information still, reports thesun.co.uk.
Mel told TV crew off-air: "I am going to be in such strife for saying that. It's all so totally bloody top-secret still."