It would be nice to have such an expendable income that you could simply buy something, wear it for four days straight (ick - not advisable) and then chuck it away, never to be worn again. That's Cameron Diaz's new fashion mantra, anyway. Femalefirst.co.uk quoted her as saying, "I actually buy my own clothes. It's kind of a drag. But I have a new philosophy, now I always wear whatever I'm wearing, the same outfit, for four days, and ...