"Yeah so it's true…i got a lil haircut…i like it," the 16-year-old star tweeted Monday.
"We are giving all the hair cut to CHARITY to auction," Bieber added. "Details coming soon."
People.com said Rascal Flatts bass player Jay DeMarcus posted a photo of Bieber's shorter haircut on his Twitter account.
'How to Train Your Dragon 2' releases 5-minute clip
Moore to attend retreat in to avoid Kutcher's wedding