Question: What 1990's girl group was Australia's Got Talent fourth season judge Geri Halliwell a member of?

Context paragraphs:
Half of Me (Geri Halliwell song): "Half of Me" is a song by British singer-songwriter Geri Halliwell.  It was released on 25 October 2013 by Sony Music Australia as the lead single from Halliwell's upcoming fourth studio album.  The song marked as Halliwell's first single release in eight years since her 2005 single "Desire".

Look at Me (Geri Halliwell song): "Look at Me" is a song by British singer-songwriter Geri Halliwell, who recorded and released it after leaving Spice Girls.  Written and composed in collaboration by Halliwell, Paul Wilson, and Andy Watkins, it was released on 10 May 1999 as the first single from Halliwell's debut solo album, "Schizophonic."  It peaked at number two at the UK Singles Chart, and at number three in both Australia and Canada.  To promote the single, Halliwell performed the song on "Top of the Pops," "Party in the Park," "Wetten Dass", "Tickled Pink," "Tapis Rouge," "Musica Si," "Festival Bar 1999," "The Rosie O'Donnell Show," "Graine de Star," and "The Tonight Show with Jay Leno."

Australia's Got Talent (season 6): Australia's Got Talent is an Australian reality television show, based on the original UK series, to find new talent.  The sixth season aired on the Seven Network from 16 April 2012 until 25 July 2012.  Dannii Minogue, Brian McFadden and Kyle Sandilands returned as judges, as well as Grant Denyer as host.  The auditions took place from October–December 2011, and the filming of the show took place from February–March 2012.  Todd McKenney was a guest judge at the Melbourne auditions, in the absence of Sandilands, and the second show of the finals showdown, in the absence of McFadden.  This was Minogue and McFadden's final series as judges, as they were replaced by Dawn French, Geri Halliwell and season 5 contestant Timomatic in season 7.

Got Talent Portugal (season 5): Got Talent Portugal (season 5) was the 5th season of the talent show Got Talent Portugal, Portuguese version of the hit got talent show Britain's Got Talent.  Each judge can press the golden buzzer once in the auditions same as last year, such as the hosts.  This year a new rule was made, the judges can give a unanimous golden buzzer that means the 3 judges can press the buzzer at the same time.

Thailand's Got Talent (season 4): Thailand's Got Talent season 4 (also known as TGT) was the fourth season of the Thailand's Got Talent reality television series on the Channel 3 television network, and part of the global British "Got Talent" series.  It is a talent show that features singers, dancers, sketch artists, comedians and other performers of all ages competing for the advertised top prize of 10,000,000 Baht (approximately $325,000).  The show debuted in June 2014.  Thailand is also the fifth country in Asia to license Got Talent series.  The four judges Chalatit Tantiwut,Patcharasri Benjamad,Pornchita Na Songkla and Nitipong Hornak join hosts Ketsepsawat Palagawongse na Ayutthaya.

Spice Girls: The Spice Girls were an English pop girl group formed in 1994.  The group originally consisted of Melanie Brown ("Scary Spice"), Melanie Chisholm ("Sporty Spice"), Emma Bunton ("Baby Spice"), Geri Halliwell ("Ginger Spice"), and Victoria Beckham, née Adams ("Posh Spice").  They were signed to Virgin Records and released their debut single "Wannabe" in 1996, which hit number one in 37 countries and established them as a global phenomenon.  Their debut album "Spice" sold more than 31 million copies worldwide, becoming the best-selling album by a female group in history.  Their follow-up album "Spiceworld" sold over 20 million copies worldwide.  The Spice Girls have sold 85 million records worldwide, making them the best-selling female group of all time, one of the best-selling pop groups of all time, and the biggest British pop phenomenon since Beatlemania.  Among the highest profile acts in 1990s British popular culture, "Time" called them "arguably the most recognisable face" of Cool Britannia, the mid-1990s celebration of youth culture in the UK.

Australia's Got Talent (season 7): Australia's Got Talent is an Australian reality television show, based on the original UK series, to find new talent.  The seventh season aired on the Nine Network from 11 August 2013 until 10 November 2013.  Kyle Sandilands returned as a judge for his fourth season, and was joined by Dawn French, Timomatic and Geri Halliwell, as well as Julia Morris as the new host.  French, Timomatic and Halliwell replaced original judge Dannii Minogue and Brian McFadden, while Morris replaced Grant Denyer.  It was the first time that the show aired on another network, following its axing from the Seven Network in October 2012.  The auditions took place from March–April 2013.

Australia's Got Talent (season 4): Australia's Got Talent is an Australian reality television show, based on the original UK series, to find new talent.  The fourth season premiered on the Seven Network on 13 April 2010 and ended on 15 June 2010.  Radio DJ Kyle Sandilands and Irish singer Brian McFadden joined the judging panel as replacements for Red Symonds and Tom Burlinson.  Auditions took place throughout February 2010 and were held in the five major cities across Australia.  The live shows began on 11 May 2010 and ended on 15 June 2010, where dance troupe Justice Crew were crowned the winners of the fourth season of "Australia's Got Talent".  They were awarded a prize of $250,000.  Runner-up Cameron Henderson was awarded a runner-up prize of performing at the 2010 AFL Grand Final.

Australia's Got Talent: Australia's Got Talent is an Australian reality television talent show which premiered on 18 February 2007 on the Seven Network.  The show is based on the "Got Talent" series format that originated in the United Kingdom with Simon Cowell.  The original judges were Tom Burlinson, Red Symons and Dannii Minogue.  Burlinson and Symons did not return for season four and were replaced by Brian McFadden and Kyle Sandilands.  Dawn French, Timomatic and Geri Halliwell joined the panel in season seven as replacements for McFadden and Minogue.  All four judges from season seven will be replaced by Kelly Osbourne, Ian "Dicko" Dickson, Sophie Monk and Eddie Perfect in season eight.

Geri Halliwell: Geraldine Estelle "Geri" Horner (née Halliwell; born 6 August 1972) is an English pop singer-songwriter, clothes designer, author and actress.  Halliwell came to international prominence in the 1990s as Ginger Spice, a member of the successful girl group the Spice Girls; together they sold over 85 million records worldwide, making them the best selling girl group of all time.  In 1998 Halliwell left the Spice Girls, though she rejoined the group when they reunited in 2007.  Halliwell reportedly amassed a $40 million fortune during her last two years in the group.

Supporting paragraphs: Australia's Got Talent (season 7) Geri Halliwell
Answer: Spice Girls