Another greatest hits collection, just five years after her last? Who does Britney think she is, Madonna?! Well, sort of. But more to the point, you might call this Britney's post-crazy, post-comeback celebration of her career highlights -- including the musical ones that often accompanied personal lowlights (selections from Blackout). The regular version of the Collection is solid, a reminder of just how real Britney's "pop princess" title was/is. But this bonus version is fabulous, jam-packed with nuggets and lesser "hits" you've likely forgotten ("Autumn Goodbye," anyone?!).