premise: Mel B had a career.
hypothesis: Melanie Janine Brown ( born 29 May 1975 ) , better known as Mel B or Melanie B , is an English singer , songwriter , presenter , television personality , dancer , actress , author , and model . Brown began her solo career when she released `` I Want You Back '' with Missy Elliott on Virgin Records . She became the presenter of shows such as This Is My Moment , Top of the Pops , Party in the Park and The All Star Animal Awards . During this time she became the female co-host for Dancing with the Stars Australia , in which she hosted the twelfth season alongside Daniel MacPherson . In February that year , she officially signed on to become one of the four judges for the variety talent show America 's Got Talent , replacing Sharon Osbourne from the eighth season onwards .