Can't remember the name of this song?

there is a very comical song i think from the seventies in which the singer talks about how good looking he is when he looks in the mirror and in his blue jeans...the entire song is pure vanity and quite humorous...anyone know which one it is? they did used to play it on the radio back in the day i know on the am stations....last time i ever heard it was back in 1980s