Justin Bieber has a new hair color that should look very familiar to fans.After shaving off those dreadlocks and going back to brunette, Bieber is, once again, a blond.Following in the footsteps of those others celebs who have been rocking this spring's trendiest hair color, Bieber showed off his new platinum look on Instagram.Since Bieber gave no explanation for the sudden change, we'll have to assume it's because blonds really do have more fun — or, he was jealous of Zac Efron's newly blond locks . Totally possible.