Well, she does have rock-hard abs.
The 52-year-old singer-dancer-fitness fanatic cut the ribbon on her first gym, Hard Candy, named for her 2008 album of the same name.
For about $160 a month and a one-time joining fee of about $832, which includes the first two months of membership, residents of Mexico City can sweat like the Material Girl. The classes in particular will have an extra touch of Madge as she helped with the choreography to make each class reflect her personal style.
The singer plans to open a chain of gyms worldwide.
“Our plan is to use Mexico as a place to fine-tune our brand and then expand it to other countries,” she told the BBC.