[HIGHLIGHTS] That's how wickedly Sarah tricks her brother Ben Zucker on "Do You Understand Fun?"

Pop star Ben Zucker (39) is put to the test by his younger sister Sarah (37) in "Do you understand fun?" The prank is staged to test the pop star's patience. How the action will turn out for the star and his sister will be shown on Saturday, May 27, from 20:15 p.m.

on Das Erste. The show also welcomes Gaby Dohm (79), the "Sesame Street" doll duo Ernie and Bert, Hans Sigl and Thomas Morgenstern.