Here's a discography:
http://www.geocities.com/mecofan/discography/disco.html
scroll down to the 1983 "Ewok Celebration" LP.
Quote:
"However, the Ewok Celebration theme is nicely arranged and includes a great rap by C-3PO (performed by Duke Bootee) telling their adventures to the ewoks in their own language and including sound effects"
none
'yabbu dabbu Darth Vader'