POMONA >> Festivalgoers caught Bieber Fever during Jack U's star-studded set during the last night of this year's HARD Summer music festival.
Justin Bieber joined the super DJ duo Skrillex and Diplo of Jack U on Sunday for the team's current single "Where Are U Now," shocking fans who screamed and cheered as
"I was surprised," said Jonathan Chou, 21, of Arcadia after Bieber's performance.