Is Heidi Klum the modern sleeping beauty? We think so.

44-year-old model, fashion designer, and businesswoman Heidi Klum doesn’t look much older than her 28-year-old boyfriend, Tokio Hotel guitarist Tom Kaulitz—even though the mother-of-four is 16 years his senior. The couple was recently seen sun-bathing on the beach in Mexico, and the topless Project Runway star looked more fit and toned than most women half her age.

Klum says she isn’t obsessive about trying to avoid aging, because sooner or later it’s inevitable for all of us. However, Klum does try to stay healthy and youthful by getting lots of sleep. In fact, Klum reportedly sleeps for at least 10 hours every night.

Most adults only need about 7 to 9 hours of sleep each night. Judging by the supermodel’s radiant complexion and toned figure, though, that extra beauty sleep certainly appears to be paying off.

Photo source: heidi-klum-picture-4 by jingdianmein/Sweety High