endorsing a Product

when somebody endorse's a Presidential canidate or a Product how influential is it to you? does it make you want to get the Product? even as a Huge Michael Jackson fan ain't no way in the world was i gonna drink Pepsi? i see ads all the time and just because I dig somebody's talent be it in music, sports,acting,etc... doesn't mean I want that particular thing to have or enjoy. for instance if you see some sneakers how important are they to you?and does the cost matter or because of a logo or a sign does that make you more eager to get it? Product placement has been around for so long and it will always be around and we just accept it without any questions asked. of course it always impacts your spending habits no matter your age except when you get to a point in your life where you whatever and I could careless. now that is the veto power you always want to have.