The Voice coach Jessie J could be jeopardising her health by been losing out on sleep, according to a recent article. The singer-turned-judge is surviving on just four hours' sleep a night according to Now Magazine (April 10th). Jessie could benefit more than most from extra time under the covers of a comfy guest bed while away touring, due to a health issue. At age 11 Jessie discovered she has a potentially life-threatening heart rhythm problem called Wolff-Parkinson-White syndrome, which could leave her at risk of complications if she becomes too stressed. Therefore, taking time out to relax and ensure she is getting the recommended seven to nine hours of sleep each night is even more important. Jessie recently toured Australia and is currently balancing her commitments to BBC1's The Voice with her own music career. A source spoke to Now about Jessie's busy schedule. "She wants to do the best job she can, but she doesn't cope well with stress and her life right now is exactly that 24/7," the source said. "She isn't sleeping well and is generally worrying way too much about her acts [which she mentors on The Voice]." The source concluded by expressing a wish for Jessie to relax and take care of herself.