It had been reported that the development of stage show Viva Forever had been delayed by bickering between the Mels - leaving writer Jennifer Saunders frustrated.
Mel caught the rumours in a Grazia magazine article and felt compelled to set the record straight via Twitter.
She said: "Starting to get very irritated with reports that myself and @OfficialMelB are 'bickering' over the Spice Girls musical. Now @Grazia_Live are at it. Maybe I should cancel my subscription? Aaaaaaaarrrrrgggghhh!
"The Spice girls musical is coming along beautifully and all of us girls, [Jennifer Saunders] and Judy Craymer are very happy!!!"
All the members of the group are involved in the creation of the musical, although none of them will appear on stage.
We also told you recently how Geri Halliwell is reported to be getting her own reality TV show.
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