premise: Mel B worked with at least one artist.
hypothesis: Mel B . Brown began her solo career when she released `` I Want You Back '' with Missy Elliott on Virgin Records . In June 2012 , she was a guest judge during the Manchester auditions for the ninth series of The X Factor UK , as one of the temporary replacements for Kelly Rowland ; before the role eventually went to Nicole Scherzinger . 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 . The X Factor is a British television music competition to find new singing talent .