U.S. pop star Madonna has begun showing the physical signs of aging despite a strict dietary and exercise regime, The Daily Mail says.

The British publication reported Saturday that while the "Material Girl" maintains a strict macrobiotic diet and routinely exercises, the 50-year-old looked her age while exiting a Paris hotel this week.

The celebrity's declining appearance also comes amidst rumors she has had plastic surgery to maintain her famed sexy looks, the newspaper reported.

The mother-of-three is said to conduct two-hour workout sessions six days a week to maintain her body after 25 years in the music industry.

Madonna, who is pushing through a 50-date worldwide tour, owns an $11 million private gym where she conducts her weekly fight against the aging process, the Mail said.