Old songs

I keep hearing old songs on modern adverts on TV. I guess because some old songs are going out of copyright. Imagine an electric car being sold with Dean Martin or Frank Sinatra singing in the background. Or is it because musicians are selling off their play lists so advertisers can use them. I’m sure I’ve heard a few David Bowie songs on ads recently? It’s a funny old world, and songs that were written and recorded before most people were born are out there now….