In a special Christmas-themed "Naughty or Nice" edition of his ongoing "Lie Detective" bit, Jimmy Kimmel tries to persuade cute kid brothers Fletcher and Sammy to resolve their naughty disputes and play nice, with a little help from a fake lie detector.

Talk show host Jimmy Kimmel has a well-established penchant for playing mean pranks on kids — usually by proxy. There was the infamous Halloween treat trick, the notorious Nasty Christmas gag, and the hilariously underhanded "Waking Kids Up for School in Summer."