The reunited girl band - Victoria Beckham, Mel B, Geri Halliwell, Emma Bunton and Mel C - played 17 shows at London's O2 arena and as part of their reunion world tour netting them £50 million collectively.
Almost 400,000 fans paid up to £75 ticket to see them, making it one of the most lucrative concert residencies ever.
A source said: "It's been a huge success for them and this run of shows at The O2 will probably be the icing on the cake of their reunion. Barbra Streisand had high ticket prices but only did three nights while Prince did 21 nights but sold tickets at a very reasonable price - not many groups can sell out 17 gigs at £75 a ticket, it's quite an achievement."
Famous fans at Tuesday night's concert included Victoria's soccer star husband David, and their three sons, Brooklyn, Romeo and two-year-old Cruz. Sir Bob Geldof was also in the crowd along with his teenage daughter Pixie.
David Campbell, chief executive of The O2, said: "It's been a lovely, friendly, family atmosphere over the past few weeks, we have really enjoyed having the girls here."
The band now have two dates in Manchester before heading to the US where they will play venues in Boston, Chicago and New York.
A source said: "It's been a huge success for them and this run of shows at The O2 will probably be the icing on the cake of their reunion. Barbra Streisand had high ticket prices but only did three nights while Prince did 21 nights but sold tickets at a very reasonable price - not many groups can sell out 17 gigs at £75 a ticket, it's quite an achievement."
Famous fans at Tuesday night's concert included Victoria's soccer star husband David, and their three sons, Brooklyn, Romeo and two-year-old Cruz. Sir Bob Geldof was also in the crowd along with his teenage daughter Pixie.
David Campbell, chief executive of The O2, said: "It's been a lovely, friendly, family atmosphere over the past few weeks, we have really enjoyed having the girls here."
The band now have two dates in Manchester before heading to the US where they will play venues in Boston, Chicago and New York.