Victoria Beckham has admitted that her heart wasn't into the Spice Girls reunion in 2007.

The pop group reunited after a long hiatus for a number of live shows in 2007 and 2008 across Europe and North America.

However, Beckham told Paris Vogue that her mind was elsewhere when she took to the stage each night.

She said: "I realised it was finished for good in 2008, when we reformed for our reunion tour. It should have been the best moment of my life, but I just wanted to be elsewhere."

The fashionista added: "It wasn't a lack of respect for the girls or the audience, but the passion just wasn't there. By contrast, in my new career, the passion grows every year. I still want more."

Beckham also said that she ultimately devised her stern-faced Spice Girls character to deal with insecurity and shyness.

The Spice Girls meanwhile later reunited briefly to perform at the London 2012 Olympic Games closing ceremony.