Demi Moore in mud at meditation session on Mexico beach

Demi Moore exposed a less flattering side of her age-defying physique when she headed to a spa resort in Mexico for a spot of pampering.

Demi Moore, 50, stripped down to a floral print bikini for a meditation session on the beach at the Amansala Eco-Chic hotel in Tulum – where fellow guests could not help but notice her wrinkled tummy.

While Demi Moore still possesses a body many women would die for, her creased stomach was a far cry from her famously ripped abs shown off during her star turn in 1997’s G.I. Jane, when the actress transformed her figure after a grueling fitness regime run by a Navy SEAL.

Participants smeared their bodies with clay for the meditation class but Demi Moore irritated fellow guests by opting to lie down instead of standing before breaking into a strange impromptu dance, according to reports.

As well as the meditation session, Demi Moore treated herself to daily massages and treatments at the resort, where rooms at the “rustic luxury hotel” can cost up 295 dollars a night.

Demi Moore headed to Mexico on December 23 – just two days after third husband Ashton Kutcher filed for divorce following their separation in 2011.

News of the looming divorce capped a difficult year for Demi Moore, who has been battling health issues and checked into rehab last January.

According to The National Enquirer, Demi Moore headed to Mexico before Christmas at the behest of daughters Rumer, 24, Scout, 21 and Tallulah, 18, who had grown increasingly concerned by their mother since her split with Ashton Kutcher.