Justin Bieber's gone blonde! Credit: Courtesy of Justin Bieber

#BlondeBieber! Justin Bieber's decided to switch things up ahead of the new year — the "Boyfriend" singer dyed his brown hair bright blonde on Thursday, Dec. 4.

A source tells Us Weekly the 20-year-old singer got his dye job done at Nine Zero One salon in Los Angeles. The insider adds the star hasn't dyed his hair in years — not since he was "like 11 or 12."

The Biebs teased fans on Twitter, writing along with a link to his Fahlo account: "Left something for you on my @OfficialFahlo #blondebieber :) http://fahlo.me/justinbieber." 

On his Fahlo account (a new Instagram-like app) Bieber debuted his new look with — naturally — a shirtless selfie captioned simply: "#BlondeBieber."

Tell Us: How do you feel about blonde Bieber?