The `It Girl` singer doesn`t need to have the recommended eight hours of rest per night but admits it takes a lot to wake him from his slumber.
In a feature for Us Weekly magazine entitled `25 Things You Don`t Know About Me`, he revealed: "I sleep about fourhours per night and I cannot wake myself up. Someone has to wake me up by either banging on my door or physically shaking me."
Jason is obsessed with routine in his life and applies a regimented structure to everything he does.
This order even applies to what food he eats and he admits if he discovers a new meal he enjoys he`ll eat it every day.
He said: "Once I find a meal that like, I`ll eat it every day for months. The meal becomes a part of my routine until someone forces me to try something else."
However, the 22-year-old musician is useless at cooking and always has to eat out or have takeaways because all his efforts at mealtimes prove to be disastrous.
He explained: "I wish I knew how to cook. Every dinner attempt has ended in a disaster - I love (restaurant chain) Olive Garden, especially the Alfredo sauce. But when I went Italy they didn`t even know what Alfredo sauce was. Shocking!"