She had opposed a reunion of the Spice Girls but now she has changed her mind. “For the first time ever, there is some truth in the rumours. We’ve been discussing it and it could possibly happen,” the 33-year-old singer, known as Sporty Spice, told British Broadcasting Corp. radio. Never trust a pop star. She said that “There is just so much great feeling out there and I just thought, ‘You know what, I don’t…