This is from "fast take" - quite interesting. But somewhat not surprising or? And the tendency is even increasing.... quote:
"Seven of the ten most-recalled ads of 2003 included celebrities. To use a celebrity spokesperson or not, that is the question -- at least in the insular world of Madison Avenue. This summer, it seemed as if medical science had taken a step closer to finding a definitive answer when researchers at UCLA and CalTech found that simply flashing the letters "H-A-L-L-E-B-E-R-R-Y" triggered a strong cognitive response in a single human brain cell. The letters drew the same reaction as a picture of the Academy Award-winning actress. The trick also worked with Jennifer Aniston and the Sydney Opera House. Although this brain research is preliminary, the implication is that fame -- or at least familiarity -- tops everything when it comes to stimulating recall. In other words, it's possible that celebrities are actually taking up residence in individual neurons. "