BACK TO BASICSThis CD includes "Back To Basics" bonus video. Christina Aguilera seemed intent on constantly reinventing herself over the course of her first several albums, and it's hard not to be impressed by her leaps from teen pop sensation (1999 self titled debut) to raunchy, sexually precocious R&B singer (2002's STRIPPED) to blues and jazz steeped diva on 2006's BACK TO BASICS. With its smoky torch songs, occasional big band arrangements, and allusions to