Although a fashion designer may conceptualize a trend, the stars who wear them are the real influencers.

When Kate Middleton continued to carry tiny purses at each event she attended, the fashion world payed attention, and now everyone is ditching their big, bulky bags for elegant clutches a la Duchess Kate.

Not only does a celebrity influence much more than fashion, but this effect on decor, hair and beauty is not a recent phenomenon. From Marilyn Monroe and Elizabeth Taylor to Amy Winehouse, Hollywood has started beauty trends for decades.

Click through the gallery above to see the beauty techniques that celebrities brought into the mainstream -- and who is sporting these trends today.

Beauty Tips: The Benefits of Avocados

Beauty Tips: The Benefits of Avocados