BSPEARSSEANPRESTON050807_21.jpgBritney Spears BSPEARSSEANPRESTON050807_20.jpgWe couldn't help but notice the way Britney's demeanor towards our cameramen when she went in compared to the exhausted, camera-shy affect she adopted on her exit. Britney's fondness for X17 is pretty well-documented (and it's worth noting that the videographer who shot this footage happens to be her favorite out of all our guys), so we're pretty sure she wasn't just feeling empowered and positive thanks to the presence of her police escort. Our guess? Our homegirl was straight-up worn out from her intensive practice session - not to mention the rigors of touring!