In 1978 Gary Numan, then still with Tubeway Army, did the vocals for a commercial for the English jeans manufacturer Lee Cooper. The commercial featured some hyper-fashionable Londoners with pasty skin and glowing green and blue eyes. In the commercial, Numan sings a song called “Don’t Be a Dummy” with the following lyrics:
 

Don’t be a dummy!
Move like honey
Don’t be a dummy!
Use your money
Come out proud, don’t hide in the crowd
Find the gear of love to grind
Find the gear to suit you
Mine’ll suit ya!
Lee Cooper!
Lee Cooper!

 
Interestingly, according to an article by Nick Robertshaw that appeared in Billboard in October 1978, music executives pushed hard for Numan to release the song as a single, but he wouldn’t do it:
 

From the outset, [Numan] has been an artist who demands full control over every aspect of his career. Beggars Banquet and licensor WEA tried to have him release as a single his performance of a television jingle for Lee Cooper jeans, doubtless hoping to repeat David Dundas’ success with “Jeans On.” Numan refused, arguing it would jeopardize all he wanted to do.

 
“Don’t Be a Dummy” actually was released as a single—but not with any involvement on Numan’s part. The song featured vocals by John Du Cann—guitarist for Atomic Rooster—with cover art making a direct reference to the Lee Cooper commercial:
 

 
Here’s the actual commercial:
 

Previously on Dangerous Minds:
Gary Numan is a fashionable android in this vintage Japanese TV commercial
Boy George, Gary Numan, Elvis Costello & more tell what ‘they’d’ do if they were Prime Minister