Back in the day, you almost never heard well-known songs in TV commercials. But then in the 80s, things began to change.
The turning point was a Nike commercial in March 1987 that used the original version of the Beatles’ “Revolution.” People were aghast, but after that campaign, there was no going back. A new industry was created of companies whose sole purpose was to negotiate through the legalities of using a well-known song in a commercial campaign.
Today, using a song to sell your product or service is pretty much the norm. In the age of cratering music sales, licensing songs has become an extremely important alternate source of revenue.