Sure enough, the Canadian pop star followed through with his promise. First, Scooter and Ryan jumped on stage, wearing bright-colored hair pieces. Minutes later, Justin and Jaden appeared to punk the 10-year-old, but without any extensions. As you'll see, Jaden doesn't need them.

"Our new back-up dancers!" Willow, the good sport, said between smiles and laughs. Justin whipped his hair and banged on a cowbell before skipping off stage, but Scooter, Ryan and Jaden continued to dance with the ensemble.

Justin tweeted proudly: "Me and @officialjaden and @scooterbraun and @thatrygood #PRANKSTERSONTHELOOSE."

Watch out, Willow. According to Justin, this is just the first phase. Check out video footage of the prank below. What do you think of the stunt? Is it on par with Justin's other pranks?

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