I think Bruce was really talking about Pop Music Industry and how this wanted to destroy metal forever. He just putted Britney because she was the featuring star of the Music industry at that moment and I think she was the star at the Rock In Rio pop day.
That's correct. In almost every concert in 2000 he said something about pop music or pop stars. As a matter of fact this was nothing new because in the 80's he also said things about Rick Asley and the likes so I don't get what's all the fuzz about what he said about Britney or the like