Argh! I’m guilty of this! Very very much guilty! That if I really really like this makeup of mine, its so hard to throw away! Even if its “expired”. Mascaras for example, Their shelf life usually is 3 months, but even after 6 months and it is still okay, I still use it! Maybe this will serve as our guide on how long we should keep our cosmetics, but of course sometimes we disobey *wink wink* According to the article from http://www.ivillage.co.uk/beauty/makeup/tips/articles/0,,548145_183872-1,00.html Oil-Free Foundation: 1 year Cream or Compact Foundation: 18 months Concealer: 12-18 months Powder: 2 years Blush and Bronzer: 2 years Cream Blush: 12-18 months Powder Eye shadow: 2 years Cream Eye…