I would say we are three people who have lived long enough and worked hard enough for our money that we refuse to waste it. In other words we have age and wisdom on our side.
No. Products that have been endorsed by or created by celebrities are typically average products with an above average price tag. Take Beats for example. I had a pair that a friend gave me. They aren't all they're cracked up to be.
No relevance to what I buy, and since I buy online I look at customer reviews. Also, branding, put some well known brand on an inferior product and charge twice as much. No thanks.
Chances are I have never heard of people you consider famous. I don't idolize people. Just because I saw someone in a movie role doesn't mean I would recognized their face the next day.