Ah, April Fools' Day! A time to showcase your pranking abilities -- and a sobering reminder that all pranks are not created equal.
Celebrities have been obsessed with pranking since the early 13th century (rough estimate). Yet even to this day, highly evolved famous people sometimes don't quite know when to quit. Here are some of the worst pranks both by and on celebrities.
[seealso slug="10-of-the-best-celebrity-pranks"]
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