It seems fashionable to use old music in ads. The M and S one with Santana is an example. Today I heard 'Let's Work Together' by Canned Heat used. Can't remember what the advert was for.

Some music seems to be specially composed for ads and is catchy.

Interested to discuss music used in ads? Real - and imaginary examples welcome! Can we beat Victoria by Kinks used in ads for Victoria Plumbing?