When you’re A-list offspring, you get to do all sorts of exciting and glamorous things while normal kids spend their weekends hitting each other with High School Musical soundtrack CDs. This weekend, Tom and Katie took Suri along to watch the Spice Girls rehearse – and, according to Posh, she loved it and danced along to every song… although it sounds like it was just as much of a treat for Katie Holmes, too. “David and I are great friends with Tom and Katie,” name-drops Posh (as if we didn’t know). “It was lovely of them to come down to rehearsals, a really nice surprise. Katie has told me before that she used to be a big Spice fan, so it was great for her to meet the other girls.” How we’d love to be a fly on the wall during that particular meeting of minds…