What if you could play a prank on les twins? What would be your prank of choice?

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WHAT IF?
FanfictionWhat if there was so much more to Les Twins then meets the eye? I welcome you to the world of "What if?" Where anything and everything is possible in short tales. Where questions and answers have no limits. A place where LT FANS gets the last word...
Question #19
What if you could play a prank on les twins? What would be your prank of choice?