(You may also see this as a shameless spam) NPR currently airs an 8min story about Les Sans Culottes, a NY based "French" rock band led my an old buddy of mine from Detroit. Toward the end of the broadcast, they speak about a lot of impersonation going on in rock n' roll. Then I thought: what about impersonation in jazz ? and how does it relate to "the music in your head" that Ed-Fait-Quoi keeps on mentioning ? To fuel the debate further, please note that one of the faux French rockers also declares that once his initial inhibition about impersonation was overcomed, he became more productive as a composer/arranger... You can listen to that NPR story here.