"I was coming offstage, and I see the 'one less lonely girl'. I had my little camera and I was like, 'I'll be paparazzi!'" Willow dishes. "So I come out and I'm taking pictures of him and her, and he was smiling at me with the widest eyes. When he got offstage he was like, 'you're crazy!' and I was like, 'don't mess with me.'"
Still, their prank war is far from over. "I'll get him back when he's 50," Willow says.
Who do you pulled the better prank: Justin or Willow? Do you think Willow will actually wait until Justin's 50 to pull another prank?
Photos: Courtesy of Alan Silfen/Roc Nation