Melanie Brown will join its judging panel for the eighth series of <i>America's Got Talent</i>.

Melanie Brown will join its judging panel for the eighth series of America's Got Talent.

American Idol poaching the artistically articulate Keith Urban from The Voice was bad enough. Now Australia's adopted Spice Girl Mel B is leaving her (temporary) motherland, where she is a judge on The X Factor, bound for America's Got Talent.

With million-dollar contracts on the table, this is fast becoming the most expensive game of musical chairs in the world.

The US chapter of the Got Talent franchise has confirmed that Melanie Brown will join its judging panel for its upcoming eighth series.

Sharon Osbourne could appear on Nine Network's planned reboot of <i>Australia's Got Talent</i>.

Sharon Osbourne could appear on Nine Network's planned reboot of Australia's Got Talent. Photo: Marco Del Grande

She will replace Sharon Osbourne, who, as it turns out, has been tipped a possible starter for the Nine Network's planned reboot of Australia's Got Talent later this year.

Mel B, who also hosted Seven's Dancing with the Stars, has previously served as a guest judge on Britain's Got Talent.

And that's where it gets really complicated.

Uber producer Simon Cowell is known to play mix and match with judges on the various formats of his shows around the world.

Dannii Minogue, for example, was a judge on Australia's Got Talent from 2007 to 2012. She has also been a judge on The X Factor in the UK. (Note to punters: she picked the winning act in both 2007 and 2010.) Now she's off to judge the ninth series of Britain and Ireland's Next Top Model.

With Mel B heading to America's Got Talent, you could be forgiven for thinking that would leave Australia's The X Factor one judge down.

In fact, the show could be four judges down, or none at all. Talks are still underway and a Seven Network spokeswoman said nothing had been finalised with any of the judges for the 2013 season. (In case you don’t watch it, they are: Ronan Keating, Guy Sebastian, Natalie Bassingthwaighte and Mel B.)

That means when the series returns later this year there could be an entirely new judging lineup, or the same faces. It also means the global supply of A and B-tier celebrity talent show judges is about to reach an all-time low.

Very soon you should expect to see Australia's Still Got People Auditioning, Somewhere ... coming to a TV screen near you. Who wouldn't pay to watch a show like that?

The good news for Mel B fans is that The X Factor's loss is not the loss of Australian TV.

America's Got Talent airs in Australia on FOX8 and the next season, according to a spokeswoman for Foxtel, will air later this year on that channel.