INT. ART GALLERY. DAY.
A MAN AND WOMAN ARE LOOKING AT A PICTURE OF THE MONA LISA. THE MONA LISA'S FACE HAS BEEN REPLACED BY SUSAN BOYLE'S FACE. SHE HAS HER THUMB IN HER MOUTH.
MAN:
... She's no Boyle painting.
Art gallery
A good punchline in search of a better sketch.