Do you feel sluggish or well rested as you head out the door to work or school this morning?According to most health experts, the average person needs between 7 to 9 hours of sleep a night. If you suffer from a lack of sleep it can cause major health issues, including increased stress, premature aging, even serious illness. Teens tend to need more sleep, shift workers less. Here are a few celebs that make it on almost no sleep.

Martha Stewart. The always busy body tells Cnn that she makes it on less than 4 hours of sleep a night.

Donald Trump. The Donald says that in his bid to take over the world he only gets 3 maybe 4 hours of sleep a night.

Kelly Ripa hosting a morning show raising three kids and a production company keep her so busy sleep is the last thing she worries about.

Marissa Mayer the new CEO of Yahoo says that her average workweek is 120 hours, 3 times what most people work n a week. To combat this brutal work schedule, Marissa schedules vacations every 4 months to get a chance to recharge.

Jay Leno the king of late night tv works unbelieveable hours and says he is an early riser and rarely gets any more than 5 hours of sleep a night.