I've been going to the gym for about a year now and I would like to have legs like Britney Spears. I was wondering, to get this,would I need to be building muscle or just toning? I do a lot of weights on my legs, nothing too strenuous but enough so that I can feel it. Should I be increasing the weights because my legs,although more toned than before, they aren't like Britney's. Any advice would be good. Thanks.