Christina Aguilera shows off her new figure at the  2013 NBC Television Critics Association's Summer Press Tour at The Beverly Hilton Hotel on July 27. Credit: Getty Christina Aguilera shows off her new figure at the 2013 NBC Television Critics Association's Summer Press Tour at The Beverly Hilton Hotel on July 27. Credit: Getty

 

Christina Aguilera has wowed onlookers by getting back into fantastic shape recently, but she insists regular trips to the gym have not been part of the equation.

 

"If I can squeeze in a workout, great. If not, that's OK, too," she tells Maxim magazine in their October issue in which she is their cover girl.

 

Her secret? Trying to keep up with 5-year-old son Max. "Running around with him all day is pretty good exercise," she insists.

 

It was announced in May that the singer will resume her coaching duties on “The Voice” next season. She’ll replace Shakira, who occupied the spinny chair of judgment during the fourth season. Aguilera was absent last season to promote her album, “Lotus,” according toHollywood Life.