She's already a judge on Britain's Got Talent, and now Alesha Dixon will be heading Down Under to take part in the Australian version of the talent show.The mum-of-two, who previously launched a gender-neutral children's clothing collection, bagged the reported six-figure deal after her pal Amanda turned down the job. Negotiations with Amanda, 50, began earlier this year after bosses heard she was the star of Britain's Got Talent.