John and Edward Grimes, whose trademark haircuts were previously praised by Wayne Rooney, said that they will "definitely" cut off all their hair regardless of the consequences.
John told The Sun: "We're going to have a change. Go to the barber's and get it all shaved off. We might get in trouble but we like breaking the rules all the time. We'll definitely do it."
The 18-year-old said that he felt the twins' current hairstyle "intimidated" bald people.
He later joked: "I'm going to contact Britney Spears and ask her how her management dealt with it when she shaved her hair off."
Jedward recently announced details of their first UK tour.