Amazon.comThe genius of the Disneymania series -- if genius isn't too strong a word to use in association with tween-targeted music -- is the levels on which it works. If you're eight, it's the ideal jumping-off point from pure-kiddie fare: goodbye Lilo & Stitch soundtrack, hello Skye Sweetnam. And if you're 18 (or older), it's lighthearted kitsch; a lively, listenable, and sometimes surprising excuse to revisit songs you loved as a kid. In addition to Disney's own popster parade (Jump5, The Cheetah Girls, Christy Carlson Romano), mainstream hit makers like Jessica Simpson and Clay Aiken don their mouse ears for 3 -- the charm in a series that will leave tweens of all stripes wishing upon a star for a 4 that's as bright and shiny. --Tammy La Gorce