"I'm thrilled to be part of this season of America's Got Talent and to get to work with Howie and Howard," Brown said in a statement. "It's so exciting to be bringing some Girl Power to the panel!"
"This exciting addition of the dynamic Mel B to our lineup of judges promises that fans will see a strong, talented and opinionated woman match up against our equally outspoken judges Howard Stern and Howie Mandel,' added NBC reality chief Paul Telegdy. "Her presence has powder-keg potential for lots of fireworks this summer as the #1-rated America's Got Talent will return with even bigger and more exotic acts than any year before."
Stern joined the show as a replacement for Piers Morgan last year while Mandel was added to the panel in 2010 as a replacement for David Hasselhoff.
After starring in Mel B: It's a Scary World, a reality series which aired on the Style network in 2010, Brown served as a judge on the last two seasons of Australia's edition of The X Factor and co-hosted last year's Australian edition of Dancing with the Stars.
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