----------------------------Original message---------------------------- There's a collection of Warner Bros. cartoons that is devoted to this called, I think "Hooray for Hollywood," but this is so common in Warner Bros. cartoons that looking though any of their (many) anthology tapes or laserdisc collections would turn up examples. Collections of Betty Boop cartoons would do the same to some extent: she imitates various 30s stars in her cartoons. Hank Sartin, who's out there somewhere on the net (and who is at the University of Chicago in real space) is currently working on this topic, so he would know all the examples.