The singer-and-actor – who is dating actress Jessica Biel – admits he can't bare to leave his pimples alone and won't let them go away naturally.
He said: "What do I do if I have a spot? Get rid of it! I love doing that."
Justin also admitted he is "religious" in his use of sun screen as he fears getting red-skinned.
He said: "I'm religious with sunscreen. British men do lobster don't they? When I worked in Orlando as a kid, you could always tell who the Brits were. They had tank-top lines and bright-red arms."
Apart from his use of sun screen, the 'SexyBack' star insists he does little to look after his appearance.
He added to Cosmopolitan magazine: "I don't do a lot of that stuff. I trim my eyebrows when I have my hair cut and I have massages, but they'll be like, deep tissue. It's more in the clothes for me.
"I have a face wash. And I will put lotion on. And maybe some aftershave."