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The pint-sized diva was punked by Bieber, his manager Scooter Braun and swagger coach Ryan Good in the middle of a live performance of her hit 'Whip My Hair' at a show in Manchester, England. Bieber's older mentors rush the stage in neon-colored wigs and proceed to whip their hair next to a surprised Willow and her fellow pre-teen back-up dancers.
The '21st Century Girl' laughed off the party crashers and continued with her routine like a true professional, only to find Bieber playing a cowbell in her face and her big bro Jaden Smith whipping his fabulous 'fro back and forth.
Willow is opening for the Biebster -- who she considers a brother figure -- on his current Euro-tour. But, Willow wont let brotherly love get in the way of some well-deserved revenge. The rising star took to her Twitter page to announce game on tweeting, "My big brothers Justin and Jaden pranked me on stage tonight...#payback!!!"
Watch the video footage of the on-stage prank.