[Bart's voice] Yo, what's happenin' man, this is Bart Simpson [laughs], [normal voice] [...] [Bart's voice] Just kidding, don't hang up, this is Nancy Cartwright.

Quoted in Olshansky, Elliot (2009-01-28). Bart Simpson's voice being used to promote Scientology event. New York Daily News. Retrieved on 2009-01-28.