Based on

Movies like Character Studies (1927)

Carter DeHaven announces that he will perform a series of "impressions." For each we see him applying makeup and changing the combing of his hair or putting on a wig. When he tilts his head down during each supposed makeover, up pops the actual celebrity (Keaton, Lloyd, Arbuckle, Valentino, Fairbanks, Coogan) he appears to have been making himself up as.