“Girl Power” has aged surprisingly well when you look at the way that the girls began their tour on Sunday night in front of nearly 16,000 screaming fans at GM Place. The five of them sang and appeared to be full of energy when doing their fun and often racy live act. The five Spices – Scary (Mel B), Ginger (Geri Halliwell), Posh (Victoria Beckham), Sporty (Mel C) and Baby (Emma Bunton) have not sung…