Scary Spice Melanie Brown has reportedly thrown the Spice Girls' reunion tour rehearsals into chaos after making it to the finals of hit US reality show ‘Dancing With The Stars’.

The ‘Wannabe’ singer and professional partner Maksim Chmerkovskiy are desperate to beat rivals Marie Osmond and racing driver Helio Castroneves in the popular TV series.

But Brown’s dedication to the contest - which reaches its climax on Monday - is reportedly playing havoc with her commitments to the Spice Girls.

A source told British newspaper The Sun: "The opening night is days away yet there hasn't been much time for rehearsals. A lot of Mel's time has been taken up with preparations for each Dancing With The Stars.

"The girls are really proud of her but at the same time they're worried that Mel will give her all to the dance show and be exhausted for the start of the tour."

The Spice Girls kick off their world tour in Vancouver on 2 December - just six days after the show's finale.