but she did tape a video—one that was crashed by longtime "Saturday Night Live" character Mary Katherine Gallagher, played by Molly Shannon.

As Harris kicks off her speech, Shannon's Mary Katherine Gallagher, a character she originated on Saturday Night Live in the 1990s, is quickly seen running across the screen behind her.

Harris enlisted actress Molly Shannon, who revived her beloved Saturday Night Live character, Catholic school girl Mary ...