Chart Watching: 12/27 Shania's holding on tight to the #1 spot this week, but J. Lo, along with Avril, Eminem, and the Dixies, aren't far behind. Watch all 5 now. music_lopez_jennyfromtheblock.jpg 187x47 1 lock_icon.gif video.gif http://smilparse.real.com/showcase/cliplists/1202/charts1227.ram 10410277898010 LAUNCH THE COUNTDOWN lock_icon.gif lock_icon.gif lock_icon.gif headline