Kimberley's going to help Cheryl, Emma will be Dannii's sidekick, Shane will be on 'team Louis' and Sinitta will be giving Simon a hand.
This is brilliant news! When we heard Britney was going to be performing on the show, we thought we'd had all the excitement we could handle, but what did we know?! A Spice Girl and West lifer? This series just gets better and better.