The Spice Girls announced today that they will reunite after 7 years

They will embark on a 25-city World tour as soon as this Christmas.

Sources say that the girls have already headed to the studio to record their "vocals" for the tour.

The source said, "When the girls sing out of tune on stage, the mistakes in their voices are instantaneously corrected - in less than a tenth of a second - by computer to perfect the pitch and tone."

"And it is this remastered "virtual voice" which belts out across the arena. The girls' vocals are altered so quickly that it will appear the resulting perfect voices are live and their own."

The Spice Girls will each take home around $20 million

Source: Daily Mail