The reunited Spice Girls have burst onto the stage at London's O2 arena for their first UK concert in nine years.
Tickets for the first night in London sold out in 38 seconds
"Thank God we're home," yelled Mel B, while Geri Halliwell said: "What a crowd! We love you London!"
Guests in the audience included R&B star Rihanna and Gordon Ramsay as well as Victoria Beckham's husband David and their sons Brooklyn, Romeo and Cruz.
Emma Bunton, who injured her ankle earlier this week, wore an elasticated support throughout the concert.
Fans travelled from across the UK to witness the band's homecoming gig.
"I burst out crying," said Linzie Freeth from Devon. "I couldn't control myself. I've been waiting for this all my life."
Sophie Bisset, from Sidcup, south east London, described the two hour show as "electrifying" and "wonderful".
"They were as good or even better than they were the first time around," added her sister Katy.
Tickets for Saturday's gig, which cost up to £75, sold out in just 38 seconds when they went on sale in October.
As a result, 16 further London dates have been added, in addition to two nights in Manchester next year.
The gigs form part of the girl power quintet's world tour, which kicked off in Vancouver earlier this month to broadly positive reviews.
Fans turned up in replicas of Geri's famous Union Jack dress
The two-hour show features eight costume changes and a laser-lit stage backed with huge video screens.
Alongside songs from their heyday, including Wannabe and Stop, the set also incorporates solo hits by Melanie C, Geri Halliwell and Bunton.
The tour marks the first time the band have performed as a five-piece since a 1998 gig in Birmingham, shortly after which Halliwell walked out on her bandmates.
On the opening night of the reunion tour, Halliwell referred to the incident by amending the lyrics to the band's debut single, Wannabe.
Bunton hobbled off a plane on crutches when she arrived in the UK
"If you really bug me then I'll say goodbye," she sang, adding: "And I did!"
Bunton injured her ankle during the band's final US concert in Las Vegas on Tuesday.
The 31-year-old has been receiving treatment from David Beckham's doctor in a bid to get fit for the London show.
In the coming months, the five will also perform in Cape Town, Buenos Aires, Shanghai, Sydney and Beijing.
But the original dates for these performances have been cancelled after the band decided to reschedule the tour due to cope with exceptional demand for tickets.
Fan Kevin Hughes, from Cardiff, said the tour would not be the end of the group's comeback.
"After tonight, they'll want to do an album," he said.
"I think in a year's time they'll have a new album and another comeback."
The show was absolutly amazing!!! It was a childhood dream that finally came true!! I hope they don't stop there and make a new album!! They were great!!
Why so much fuss about these five girls, none of them has got any musical talent at all and none of them is a really good singer. There is so much real talent out there that does not get a chance. Media hype in fact is killing real talent and musical culture.
E. Hagen, London UK
I felt like I was nine or ten again! It was so nice to see them altogether again and hearing all the old hits. It was amazing, and well worth the ticket price.
Lauren, Wickford, uk
I'm 15 and it was absolutly amazing! I enjoyed it so much! Amazing atmosphere. I'd recomend it to anyone!
They were miming and rubbish the first time round, and they are miming and rubbish this time round. Does the phrase "We are only in it for the money" spring to mind?
Paul Williams, Taunton
What an amazing show, the sets, costumes, dancers and of course the spice girls were fantastic. If I could get tickets and go again in the UK I would. Lets hope and pray they release the concert on a live dvd.
It was absolutely fantastic. The costumes were great, the lighting was fab and the band was brilliant. The solo songs were all great too and the atmosphere was electric. I also thought that it was lovely that David, the boys and friends and family of the girls were sat in with the crowd and they made no fuss at all about being photographed. It was definitely worth it. Thanks girls!
Laura Elliott, Bishops Tachbrook, Warwickshire
What an amazing night it was last night! I dont think I have ever been to a concert with atmosphere like that - just the anticipation of the girls arriving on stage sent the audience into raptures. It was so great to relive all the old songs - when the whole audience knew all the words, the noise levels rose as everyone joined in and it added a special something to the whole experience. Everyone left on a massive high - just an absolutely brilliant occasion - not to be forgotten. And I am an aging 46 year old - not some screaming teenager - although I felt a bit like one again last night!!
Tricia Prior, Reading, Uk.
I think the spice girls were good last night, their encore was excellent. However they looked uncomfortable on stage and the sound qality was very poor in the upper level of the arena. Take That last week were so much better!
Katie Rothenberg, London
I thought they were phenomenal, totally worth the wait. victoria looked absolutely gorgeous. I hope they decide to stick it out and do another album and a few more concerts. I would love to do it all again and go see them.
Lynette Haselip, Corby, Northants
It was much better than what I had expected especially after seeing their first ever concert at Wembley 10+ years back. The ladies brought back "Girl Power" to everybody at the O2 and they still have got what it takes to entertain. Totally made in Britain - SPICE UP YOUR LIFE!!!
The Spice Girls were fantastic tonight, even better than we remembered! Emma did a fantastic job of moving around the stage considering she'd hurt her ankle. It was great! Bring out another album please.
Corinne and Tom, Ulverston, Cumbria