Depending on how an artist handled the publishing of his work, he may or may not have any control over the usage of his material.

The only time it bothers me, for example, Michael Jackson letting the rights to "Revolution" to a farking tennishoe company. Just a song ? Not in my eyes.

An entire generation will now think of expensive shoes made by underpaid, under age workers in Taiwan when they hear this tune and John Lennon had no say in it.

That pisses me off.

Now that Mitsubishi has shown that TV ads can sell music we will probably see people in line to get their material in an ad. Dirty Vegas had to form a band to answer the response generated by their song in the car makers adv.