Melanie C commented about the rumours, saying "For the first time ever, there is some truth in the rumours…it could happen", but it would just be for "a very short space of time…a final goodbye", and a thank you to the fans.

[12] During the conference, the group confirmed their intention to embark upon a worldwide concert tour, starting in Vancouver on 2 December 2007.

We are like sisters and we have our arguments, but by the end of the day we get back together", said Emma Bunton, whilst Melanie C commented that the tour "will be a proper good farewell to our fans".

[15] In the United States, the album was initially released only through Victoria's Secret stores, including three downloadable remixes of "Wannabe", "2 Become 1" and "Spice Up Your Life",[16] Simon Fuller, the group's manager, said, "I am delighted to be working with Victoria's Secret on the Greatest Hits album and welcome their innovative approach to marketing".

[21] In November 2007, the group performed together for the first time in nearly a decade at the 2007 Victoria's Secret Fashion Show, held in Los Angeles, California.

The group dressed in military-themed outfits performed "Stop" and "Headlines (Friendship Never Ends)" miming to a backing track, in front of giant glittering lights that spelled out "Spice" in the background.

[22] A taped performance of the group lyp-synching the songs, while dressed in blue sailor outfits, aired on 17 November 2007 for the Children in Need 2007 telethon.

From their pre-Spice Girls days and the forming of the group, to the first taste of success, world domination and ultimately the break up and the aftermath.

"[26] On 28 June 2007, the group held a press conference at The O2 Arena revealing their intention to reunite and embark upon a tour.

[29] In the United States, Las Vegas, Los Angeles and San Jose shows also sold out, prompting additional dates to be added.

On the first concert in Canada, they performed to an audience of 15,000 people, singing twenty songs and changing a total of eight times.

[38] Talia Kraines, writing for BBC Music was positive in her review, saying that "if you were one of the many haters of the Spice Girls back in the day, then this CD isn't going to change your mind about them.

[35] Nick Levine of Digital Spy website noted that "none of the group's three albums was devoid of filler, and their singles tended to be their very best songs, so Greatest Hits is a very welcome addition to the band's canon".

[37] San Francisco Chronicle's Aidin Vaziri commented: "After an exuberant run out of the gate with delicious pop fodder such as "Wannabe" and "Say You'll Be There," things go horribly wrong midway through the set.

All of a sudden, Ginger goes missing, self-awareness kicks in and the girls start playing catch-up with Destiny's Child, using songs that sound like that band's castoffs".

[41] Criag Mathieson from The Age newspaper said "With their failed third album, Forever, getting cursory coverage, it's all about their first two discs", whilst adding that "their debut single Wannabe remains a zesty proposition", and "the plethora of sleeve photos allow you to compare before-and-after plastic surgery looks".

[42] Darcie Stevens of The Austin Chronicle gave the album one out of five stars and said "Fifteen songs of girl power, in case you didn't get enough the first time around".